Proportions

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and then solve for the variable.

Front

If 3/4 = x/16, what is x?

Back

x = 12

Front

What is the cross-multiplication method?

Back

The cross-multiplication method involves multiplying the numerator of one ratio by the denominator of the other ratio.

Front

If a recipe calls for 2 cups of flour for every 3 cups of sugar, what is the ratio of flour to sugar?

Back

The ratio of flour to sugar is 2:3.

Front

How can proportions be used in real-life situations?

Back

Proportions can be used to scale recipes, calculate distances, and determine prices.

Front

If 5 pencils cost $2, how much do 20 pencils cost?

Back

$8

Front

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

Back

If a/b = c/d, then ad = bc.

Front

If 7/10 = x/50, what is x?

Back

x = 35

Front

What is a unit rate?

Back

A unit rate is a ratio that compares a quantity to one unit of another quantity.