MATH - PROPORTIONS

Two numbers are in the ratio of 2 to 3. If the smaller number is 18, the larger number is _____.

27

1. multiplying diagonally across the equal sign in a proportion 2. a statement that says two ratios are equal 3. a comparison of two quantities or numbers as a quotient

1. cross multiplication 2. proportion 3. ratio

If 2d = 5c, then all of the following are true except _____.

2/c = 5/d

In a group of students, the ratio of girls to boys is 3 to 2. If there are 15 girls, how many total students are there?

25

Which of the following is not a proportion?

4/10 = 12/20

On a field trip, there are 12 adults and 14 students. What is the ratio of the number of adults to the total number of people on the field trip?

6 to 13

Solve for the variable in the following proportion. 1/4 is to 1 1/4 as 2 is to b

b = 10

Solve for the variable in the following proportion. 5/25 = m/125

m = 25

Solve for the variable in the following proportion. n : 1/2 as 6 : 1

n = 3

Solve for the variable in the following proportion. 4/7 = x/161

x = 92

Solve for the variable in the following proportion. 3.6/y = 1.2/2

y = 6

If a soccer team won 7 of its 13 games, what was their ratio of wins to losses? Assume that there were no tie games.

7 to 6

All of the following are equivalent except _____.

15/5