Petrolyn oil is a combination of natural and synthetic oil. contains 4 liters of natural oil for every 5 liters synthetic oil. order to make 846 liters of petrolyn oil, how many liters of natural oil?

Answer 1

4/(4+5) = 4/9 =x/846

cross multiply and divide by 9

x = 4(846)/9 = 4(94) = 376 liters

Answer 2

Hi Tyler.

Mixing 4 liters of natural oil and 5 liters of synthetic oil gives 9 liters of petrolyn oil. So, we can correctly say that the proportion of natural oil to petrolyn oil is 4:9, or the fraction 4/9 (It would be 5/9 for synthetic oil, but we're focused on natural oil because of the question).

If there are 4 liters of natural oil in 9 liters of petrolyn, how many liters of natural oil in 846 liters of petrolyn? Set up your proportion:

natural 4 x

______ = ___ = ____

petrolyn 9 846

Multiply both diagonals: 9x = 4 x 846

9 x = 3384

Divide by 9 on both sides: x = 376

Answer: for 846 liters of petrolyn, you need 376 liters of natural oil.