Setting Up Proportions

Setting Up Proportions

Assessment

Flashcard

Mathematics

7th Grade

Practice Problem

Hard

Created by

Wayground Content

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15 questions

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1.

FLASHCARD QUESTION

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal. For example, if a/b = c/d, then a, b, c, and d are in proportion.

2.

FLASHCARD QUESTION

Front

How do you set up a proportion?

Back

To set up a proportion, identify two ratios that you want to compare and set them equal to each other. For example, if you know that 12/16 = x/18, you can solve for x.

3.

FLASHCARD QUESTION

Front

If 12 ounces of shampoo lasts 16 weeks, how long will 18 ounces last?

Back

Using proportions: 12/16 = 18/x. Cross-multiply to find x: 12x = 288, so x = 24 weeks.

4.

FLASHCARD QUESTION

Front

Pat needs 14 sticks of pepperoni for 28 pizzas. How many sticks for 36 pizzas?

Back

Set up the proportion: 14/28 = x/36. Cross-multiply to find x: 14*36 = 28x, so x = 18 sticks.

5.

FLASHCARD QUESTION

Front

What is the formula for finding a missing value in a proportion?

Back

If a/b = c/x, then x = (b*c)/a.

6.

FLASHCARD QUESTION

Front

Back

7.

FLASHCARD QUESTION

Front

To make 24 ounces of hot chocolate, 6 tablespoons of cocoa are needed. How much hot chocolate can be made with 144 tablespoons?

Back

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