Cross Product

Solving Proportions With Cross Products

2/8/21

Solving Proportions Using Cross Products

• We can solve proportions by using cross products and creating an equation.

• We need to solve the equation from the cross products by using the steps we have used to solve other equations.

 $\frac{w}{6}=\frac{6}{9}$  

 $\frac{12}{10}=\frac{a}{15}$  

 $\frac{9}{y}=\frac{3}{17}$  

 $\frac{x}{4}=\frac{10}{12}$  

Multiple Choice

There were 5 ice cream cones for every 3 brownies sold at the ice cream shop. If there were 24 brownies sold, how many ice cream cones were sold?

• 8
• 15
• 40
• 29

Multiple Choice

• 6.25
• 16
• 4
• 3.6

Multiple Choice

• 2.5
• 1
• 3.25
• -2.25

Multiple Choice

Solve the proportion.

• p=31.3
• p=308
• p=924
• p=532

Multiple Choice

A 6-ounce package of fruit snacks contains 45 pieces. How many pieces would you expect in a 10-ounce package?

• 75 Pieces
• 27-ounces
• 27 pieces
• 75-ounces

Multiple Choice

Solve the proportion:

• 4
• 8
• 14
• 10