Answer
Required proportion : $\frac{18 orders}{30 minutes} = \frac{x orders}{40 minutes}$
Solution : x = 24, i.e. pedro can enter 24 orders into computer in 40 minutes.
Work Step by Step
Pedro entered 18 orders into his computer in thirty minutes at his job. At that rate, how many orders could he enter in forty minutes?
As per the details given: $\frac{18 orders}{30 minutes} = \frac{x orders}{40 minutes}$ (Assumed x as a required no of orders)
i.e. $18 \times40 = 30 \times x$ (As bot sides have same numerator and denominator)
Now, divide both sides by 30,
$720 \div 30 = 30 x \div 30$
$ x = 24 $
