Problem: fourth proportional 3,7,15 [ Calculator, Method and examples ]
Solution:
Your problem `->` fourth proportional 3,7,15
In `a:b :: c:d`, we say that `d` is the fourth proportional to `a,b,c`.
Let the fourth proportional to the numbers `3,7,15` be `x`.
Then, `3:7=15:x`
`:. 3/7=15/x`
`:. x = (7 xx 15)/(3)`
`:. x = 35`
