How do you use the earths diameter to find the distance from the earth to the moon?

To find the distance from the Earth to the Moon using the Earth's diameter, you can use the concept of proportions and the known ratio of the Earth-Moon distance to the Earth's diameter. The average distance to the Moon is about 30 Earth diameters. By multiplying the Earth's diameter (about 12,742 km) by this factor, you can estimate the distance to the Moon, which is approximately 384,400 km.