Solving Proportions with Scale Factor

The scale factor is​​ (a)   , the missing numerator is ​ ​ ​ (b)   .

• 1

• 7

• 6

Find the value of x.

• 5

• 6

• 1.5

Solve for k

• 165

• 17

• 1/17

• 1/165

The _________tells us how many times larger or smaller a figure is from the original.

• Scale factor

• Angle

• Side lengths

• Units

The pair of figures is similar. Find the missing side.

• x = 9

• x = 28

• x = 7

• x = 63

Solve for X.

• 2 ft

• 3 ft

• 4 ft

• 6 ft

For the pair of similar figures, find the length of each side marked with a variable.

• 8 in

• 1 in

• 9.8 in

• 9.3 in

CHALLENGE! Solve for x. (You will need to set up the proportion, and solve using the distributive property).

• x = 4

• x = 135

• x = 1/4

• x = 2

• 24 in

• 96 in

• 72 in

• 62 in

• 48
• 120
• 2.5
• 15