Solving proportions in word problems

Set up two equal ratios and solve for the unknown, from map scales to recipe scaling.

Standards:7.RP.A.3

Try it: three questions

Real questions from the practice bank. Tap an answer to check it.

Question 1 of 3

A recipe uses 3 cups of flour for every 2 cups of sugar. If you want to use 9 cups of flour, how many cups of sugar do you need?

Question 2 of 3

A recipe uses 3 cups of flour for every 2 cups of sugar. If you use 9 cups of flour, how many cups of sugar do you need?

Question 3 of 3

A painter mixes 5 liters of blue paint with 3 liters of white paint to make a light blue color. If she wants to use 15 liters of blue paint, how many liters of white paint does she need?

How this fits in

Solving proportions in word problems is one skill in the Ratios & Proportions unit. Students read the unit lesson, then earn a bronze, silver, or gold medal on their last 10 answers. Medals never go down. A mastered unit comes back for review after 1, 3, 7, 16, and 35 days so it stays learned.

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