Proportions- cross multiply

Front

What is a proportion?

Back

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

Tags

CCSS.7.RP.A.2A

Front

How do you solve a proportion using cross multiplication?

Back

To solve a proportion using cross multiplication, multiply the numerator of one ratio by the denominator of the other ratio and set the two products equal to each other.

Front

What is the cross product of 5/6 = x/12?

Back

The cross product is 5 * 12 = 6 * x.

Front

If 5/X = 4/100, what is X?

Back

X = 125.

Tags

CCSS.7.RP.A.3

Front

What does it mean if two ratios are proportional?

Back

Two ratios are proportional if their cross products are equal.

Tags

CCSS.7.RP.A.2A

Front

Solve for k in the proportion k/6 = 15/18.

Back

k = 5.

Tags

CCSS.7.RP.A.2C

Front

What is the first step in solving the proportion 4/5 = 3/4?

Back

Cross multiply to check if 4 * 4 = 5 * 3.

Front

What is the solution to the proportion 5/6 = x/12?

Back

x = 10.

Tags

CCSS.7.RP.A.2B

Front

If the cross products of two ratios are not equal, what can we conclude?

Back

The ratios are not proportional.

Tags

CCSS.6.RP.A.3A

Front

What is the value of x in the equation 5/6 = x/12?

Back

x = 10.