Finding the Fourth Proportional to 28,718,651.97, 39,631,691.67 and 15,665,910.88
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Solution
The fourth proportional to 28,718,651.97, 39,631,691.67 and 15,665,910.88 is: 21,618,930.81
Step by Step Solution
- Step 1: Write the proportion equation
28,718,651.97 : 39,631,691.67 = 15,665,910.88 : x - Step 2: Convert to fraction form
28,718,651.97/39,631,691.67 = 15,665,910.88/x - Step 3: Cross multiply
28,718,651.97x = 39,631,691.67 × 15,665,910.88 - Step 4: Simplify right side
28,718,651.97x = 620,866,549,773,094.38 - Step 5: Solve for x
x = 620,866,549,773,094.38/28,718,651.97 - Step 6: Final answer
x = 21,618,930.81
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.