Question

order: potassium chloride (kcl) elixir 10 meq by mouth now
supply: the label of the bottle reads \potassium chloride 40 meq/10 ml\
how many mls will you administer?

Explanation:

Step1: Set up proportion

Let $x$ be the volume in mL to be administered. We have the proportion $\frac{40\ meq}{10\ mL}=\frac{10\ meq}{x\ mL}$.

Step2: Cross - multiply

$40x = 10\times10$.

Step3: Solve for $x$

$x=\frac{10\times10}{40}=\frac{100}{40} = 2.5$.

Answer:

$2.5$