﻿ GreeneMath.com - Proportions Test
Proportions Test

A proportion states that two ratios/rates are equal. We can check to see if we have a proportion by cross multiplying. When the cross products are equal, we know we have a proportion. We solve a proportion equation by cross multiplying and using our four - step method for solving equations.

Test Objectives:

•Demonstrate the ability to determine if two ratios/rates represent a proportion

•Demonstrate the ability to solve a proportion equation

•Demonstrate the ability to solve a proportion word problem

Proportions:

#1:

Instructions: Solve each equation.

a)

 12 = x 10 x - 3

b)

 -7p = -3 p + 4 10

Watch the Step by Step Video Solution
|
View the Written Solution

#2:

Instructions: Solve each equation.

a)

 k + 8 = 5k + 6 12 4

Watch the Step by Step Video Solution
|
View the Written Solution

#3:

Instructions: Solve each equation.

a)

 4 = 12 r - 3 11r - 1

Watch the Step by Step Video Solution
|
View the Written Solution

#4:

Instructions: Solve each equation.

a)

 y - 10 = -11 2y + 8 12

Watch the Step by Step Video Solution
|
View the Written Solution

#5:

Instructions: Solve each word problem.

a) If 7 gallons of gas cost \$27.58, how much would it cost to fill a 40 gallon tank?

Watch the Step by Step Video Solution
|
View the Written Solution

Written Solutions:

#1:

Solution:

a) x = 18

b)

 p = 12 67

Watch the Step by Step Video Solution

#2:

Solution:

a)

 k = -5 7

Watch the Step by Step Video Solution

#3:

Solution:

a) r = -1

Watch the Step by Step Video Solution

#4:

Solution:

a)

 y = 16 17

Watch the Step by Step Video Solution

#5:

Solution:

a) It would cost \$157.60 to fill a 40 gallon tank.

Watch the Step by Step Video Solution