Solving 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, you can use cross-multiplication.

Front

What is cross-multiplication?

Back

Cross-multiplication is a method where you multiply the numerator of one ratio by the denominator of the other ratio.

Front

If a/b = c/d, what is the cross-multiplication equation?

Back

a * d = b * c.

Front

What is the first step in solving the proportion 3/4 = x/12?

Back

Cross-multiply to get 3 * 12 = 4 * x.

Front

What is the value of x in the proportion 3/4 = x/12?

Back

x = 9.

Front

Which of the following is NOT a natural number? 0, 1, 2, 3?

Back

0 is NOT a natural number.

Front

What is a natural number?

Back

Natural numbers are the set of positive integers starting from 1 (1, 2, 3, ...).

Front

What is the solution to the proportion 5/x = 15/3?

Back

x = 1.

Front

If 2/5 = x/20, what is the value of x?

Back

x = 8.