Three numbers are in the ratio 1:3:4. If the difference between the two smaller ones is 10, what are the numbers?

Answer 1

(x+10)/x = 3/1
x = 5

So the numbers are 5:15:20

Answer 2

or

let the numbers be x, 3x, and 4x

3x - x = 10
x = 5

the numbers are 5, 15, and 20