Given the proportion a/b = c/d^1, solve for c

Answer 1

When we have a proportion like this we need to make sure everything is lined up.

a = c

b d

Now that we have our proportion lined up, what we have to do is easy. To isolate c, we must multiply both sides by d.

d * a = c * d

b d

The division cancels out and we are left with:

da = c

b

Answer 2