How do you write 5 is to 1 as 20 is to 4 as a proportion in fractional nation

To write "5 is to 1 as 20 is to 4" as a proportion in fractional notation, we can write it as:

5/1 = 20/4

This proportion can also be simplified to:

5/1 = 5

Therefore, 5 is to 1 as 20 is to 4 can be expressed as 5/1 = 20/4 or simply as 5 = 5.