Question

The ideal air to fuel ratio for an engine is 14.4:1. If a vehicle burns 7 lb of fuel, how many pounds of air should it draw to achieve the ideal ratio?

Answer 1

$100.8\:lbs\:of\:air$

1) Let's begin solving this problem, considering the ratio we were told:

$\frac{air}{fuel}=\frac{14.4}{1}$

Now, let's set a pair of ratios based on the question at the end of the text.

$\begin{gathered} \frac{14.4}{1}=\frac{x}{7} \\ x=7\times14.4 \\ x=100.8 \end{gathered}$

Note that we cross multiplied that. So we can tell that we need:

$100.8\:lbs\:of\:air.$

In order to achieve the ideal ratio.