Problem Solve with Proportions

A hiker want to determine the height of a cliff. She has measured her height (5.8ft) and shadow (7ft). She knows the cliff casts a shadow of 50ft. How tall is the cliff?

• 41.4ft

• 31.6ft

• 35.6ft

Determine whether this pair of ratios forms a proportion.   5/8, 2/3

• yes

• no

Solve for x 

• x = 16

• x = 28

• x = 1/26

• x = 26

Do the ratios form a proportion?

• Yes, they form a proportion.

• No, they do not form a proportion.

Solve for x

• x=6

• x =1/6

• x = 7

• x=9

Solve for x

• 1.5

• 2/3

• 3

• 2

How do you find the missing number in a proportion?

• Add Straight Across

• Subtract Straight Across

• Cross Divide

• Cross Multiply (Cross Product)

Solve the proportion:

• 4

• 8

• 14

• 10

Solve the proportion.

• 1

• 3

• 6

• 5

Solve for x 

• x = 15

• x = 11

• x = 1/11

• x = 20