Solving Proportions

Front

What is a proportion?

Back

A proportion is when two ratios are equivalent and show the same value.

Front

Solve the proportion: 3/4 = x/16

Back

x = 12

Front

Solve the proportion: 5/x = 15/45

Back

x = 3

Front

Solve the proportion: 7/14 = x/28

Back

x = 14

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 to find equivalent ratios.

Front

Solve the proportion: x/5 = 2/10

Back

x = 1

Front

If 2/3 = x/9, what is x?

Back

x = 6

Front

What does it mean for two ratios to be equivalent?

Back

Two ratios are equivalent if they represent the same relationship between numbers.

Front

Solve the proportion: 8/x = 4/2

Back

x = 4

Front

If a/b = c/d, what can we say about ad and bc?

Back

ad = bc (cross products are equal).