a/b = c/d

What is your question?

how do I solve the problem?

Is it possible to solve that with different variables?

The equation you mentioned, a/b = c/d, is a proportion. It states that the ratio of a to b is equal to the ratio of c to d.

To solve this proportion, you can use what is called the cross-multiplication method. Here are the steps:

1. Start by cross-multiplying. Multiply a by d and multiply b by c.
(a * d) = (b * c)

2. Set up an equation with the cross-products.
ad = bc

3. Solve the equation for the unknown variable.

If you want to solve for a, you divide both sides of the equation by d:
a = (bc) / d

If you want to solve for b, you divide both sides of the equation by c:
b = (ad) / c

If you want to solve for c, you divide both sides of the equation by b:
c = (ad) / b

If you want to solve for d, you divide both sides of the equation by a:
d = (bc) / a

By following these steps, you can find the value of any variable in the proportion a/b = c/d.