Saturday

December 20, 2014

December 20, 2014

Posted by **Christy** on Tuesday, September 15, 2009 at 1:17am.

Proportion 8/5 = 20/x and determine whether the methods

were correct:

Richie: First I divided 20 by 8 and got 2 1/2 Then I

multiplied by 5 and got 12 ˝ for my answer.

Martha: I think of it this way. Every time a person

takes 8 steps, another person takes 5 steps. So 16 steps

correspond to 10 steps, and 24 steps correspond to 15

steps. As 20 is halfway between 16 and 24, I reasoned

that the answer was halfway between 10 and 15. I got

12 ˝ for the answer.

Explain your reasoning.

I feel that both methods were correct in determining the answer, they were both based on comparison, the first one cross multiplied where the second one used equivalent ratios ?

Is that correct ? am I wrong or missing something ?

- Math, check my answer. thanks -
**Damon**, Tuesday, September 15, 2009 at 4:15amOK except for your typo. 12 1/2 is correct, not 2 1/2

**Answer this Question**

**Related Questions**

math - Consider the following students method of solving the proportion 8/5 = 20...

Human Resource Management - Consider these methods for performance appraisal: ...

math 116 - After solving a system of linear equations, how can you check your ...

algebra - • After solving a system of linear equations, how can you check your ...

business - Post your answer to Study Question 5.2 on p. 180 (Ch. 5). As you read...

English - Could you please tell me if everything is OK? Thank you. I had to ...

Psychology - What defensive coping methods is Michael using? What active coping ...

statistics - SAT Exam Scores – A school administrator wonders if students whose ...

math - determine whether or not each number is a common of 144 and 240. try to ...

math - Urban Community College is planning to offer courses in Finite Math, ...