Equivalent Ratios (A) - Find the Missing Value

Sep 23, 2026

Uploaded by Mia

Equivalent Ratios (A) is a K-12 practice worksheet focused on identifying missing values in equivalent ratio statements. Students learn that two ratios are equivalent when they describe the same relationship, and they apply multiplication or division to both terms by the same number. The problems include 12 ratio equations for a missing factor checkable by cross-multiplication, followed by word problems involving recipes, travel distance, notebooks, and map scale, plus a challenge involving chaperone-to-student ratios. An answer key is provided for verification.

LanguageEnglish

CategoryExam

FormatPDF

Pages3

Reading Time8 min

AccessFree to download

Equivalent Ratios (A)

Find the Missing Value

Word Problems

Challenge Problem

Answer Key

Name: ______________________________________ Equivalent Ratios (A) Remember: Two ratios are equivalent if they name the same relationship. To find an equivalent ratio: multiply or divide BOTH terms by the same number. Check: cross-multiply to verify—the products should be equal. Directions: Find the missing value to create equivalent ratios. Show your work where needed. Find the Missing Value | No. |
Equivalent Ratio | | |
No.
| Equivalent Ratio | | | | --- | --- | --- | --- | --- | --- | --- | --- | | 1. | 2 3 | = __
9 | | 2. | 4 5 | = | __

20 | | 3. | 3 4 | = | 12
__ | 4. | 5 6 | = | 10
__ | | 5. | 8
12 | = | 2
__ | 6. | 15
20 | = | 3
__ | | 7. | 12
16 | = | __

4 | 8. | 18
24 | = | __

8 | | 9. | __

4 | = | 6 8 | 10. | 5
__ | = | 20
28 | | 11. | __

9 | = | 4 3 | 12. | 6
10 | = | 9
__ | Word Problems 13.) A recipe needs 2 cups of flour for every 3 cups of water. How many cups of flour are needed for 12 cups of water? Answer: 14.) A car travels 150 miles on 5 gallons of gas. How far can it travel on 15 gallons? Answer: Mashup Math LLC | Al[l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com](l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com) 15.) If 4 notebooks cost $12, how much do 10 notebooks cost? Answer: 16.) A map uses a scale of 1 inch = 25 miles. How many inches represent 100 miles? Answer: 17.) Challenge Problem A school is planning a field trip. The ratio of chaperones to students must be 1 to 8. a) If there are 200 students going on the trip, how many chaperones are needed? b) If only 144 students end up attending, write the actual ratio of chaperones to students in simplest form. Mashup Math LLC | Al[l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com](l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com) ANSWER KEY Problems 1–12 (missing value): 1.) 23 = __9 → missing = 6 2.) 45 = __20 → missing = 16 3.) 34 = 1__2 → missing = 16 5 10 4.) ~~ ~~ = ~~ ~~ → missing = 12 6 __ 5.) 182 = __2 → missing = 3 6.) 1520 = 3 → missing = 4 Word Problems 13–16: 13.) 8 cups of flour 14.) 450 miles 15.) $30 16.) 4 inches Challenge: a) 200 ÷ 8 = 25 chaperones needed b) 144 ÷ 8 = 18 chaperones. Ratio: 18:144 = 1:8 7.) 1216 = __4 → missing = 3 8.) 1284 = __8 → missing = 6 9.) __4 = 68 → missing = 3 10.) __5 = 2028 → missing = 7 11.) __9 = 43 → missing = 12 12.) 160 = 9 → missing = 15 Mashup Math LLC | Al[l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com](l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com)

FAQs

How do you determine whether two ratios are equivalent?

Two ratios are equivalent if they represent the same relationship. Multiply or divide both terms of a ratio by the same number, then verify by cross-multiplying to check that the products match.

What skill do the main problems focus on?

The worksheet focuses on finding the missing value in equivalent ratio equations from Problems 1–12, using the same multiplier or divisor for both terms.

What kinds of word problems appear in this worksheet?

Word problems include real-life ratios such as flour-to-water in a recipe, distance per gas, cost per number of notebooks, and inches on a map scale for miles. A challenge problem also asks for chaperones needed and an actual simplest ratio.

Sep 23, 2026

Uploaded by Mia

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