Two triangles are similar. One has side lengths of 12cm, 14cm, and y. The other has side lengths of 18cm, x, and z. Showing all your steps, solve for x.
Assuming that the side lengths correspond.....note that the ratio of the first two sides in each triangle = 18 / 12 = 3 / 2
So.....x will = (3/2) 14 = 21 cm