Posted by Anonymous on .
The sum of three numbers is 81 and their ratio is 3:7:17. What is the value of the smallest number?

math 
MathMate,
Add up the ratios 3:7:17 to get 27.
Since ratios can be scaled, we can scale the ratios to have a sum of 81 by multiplying the ratios by 3,i.e.
3:7:17 ≡ 9:21:51.
Can you take it from here? 
math 
Anonymous,
no i need the answer please

math 
MathMate,
Try to add up the three numbers 9,21 and 51 and see what you get.
You're welcome to confirm your answer if you are not sure.