Final answer:
To find the total number of books on Oksana's bookcase, set up a proportion using the information given and solve for 'x'.
Step-by-step explanation:
To find the total number of books on Oksana's bookcase, we can set up a proportion using the information given. Let's denote the total number of books on her bookcase as 'x'. We know that the number of books she has read is 28. So, we can set up the following proportion:
28 / x = 2772 / 1
To solve for 'x', we can cross multiply:
28 * 1 = x * 2772
28 = x * 2772
To isolate 'x', divide both sides of the equation by 2772:
x = 28 / 2772
Calculating this expression gives us the total number of books on Oksana's bookcase.