To solve this, we can use a proportion based on the unit price (cost per pound) of the steak. Here's how:

1. The cost of 5 pounds of steak is $36.50.

2. The price per pound is: $\text{Price per pound} = \frac{36.50}{5} = 7.30 \, \text{dollars per pound}$

3. To find the cost of 3.93 pounds of steak, multiply the price per pound by 3.93: $\text{Cost of 3.93 pounds} = 7.30 \times 3.93 = 28.689 \, \text{dollars}$

So, the cost of 3.93 pounds of steak is approximately $28.69.

Do you want more details or have any questions?

Here are some related questions to explore further:

1. What would be the cost for 2.5 pounds of steak?
2. How much would 10 pounds of steak cost at the same rate?
3. If the cost per pound was $8.50, how much would 3 pounds of steak cost?
4. How much would 3 pounds of steak cost if the price was reduced by 10%?
5. How many pounds of steak can be bought with $50 at the same rate?

Tip: When solving proportion problems, always check for unit consistency (e.g., dollars per pound, pounds, etc.).