Proportions: Direct & Indirect

KWF

Junior Member
Joined
Feb 19, 2010
Messages
204
Hello:

I want to change this direct proportion into an indirect proportion and solve for the answer:
40 feet of wire rope weigh 26 pounds. What is the length 65 pounds of the same kind of rope weigh?

Direct Proportion Solution: Feet 40/? = Pounds 26/65
Answer ? = 100 feet

I think that the above would be as follows:

Indirect Proportion Solution: 40/? = (1/65)/(1/26)

100 = [40 X (1/26)]/(1/65)

So, the proportion is as follows: 40/100 = (1/65)/(1/26)

I thank you for your reply and helpful comments.
 
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