How do you write a proportion?

Answer 1

One standard way is it use colons , For example

7:14::6:12

read as 7 is to 14 as 6 is to 12.

The number in the middle are called the means; those on either end are called the

extremes. In a correct proportion, the product of the means equals the product of

the extremes. In the example, note that 7 times 12 = 14 times 6.