Finding the Fourth Proportional to 28,928,355.38, 39,920,231.12 and 15,875,278.68
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Solution
The fourth proportional to 28,928,355.38, 39,920,231.12 and 15,875,278.68 is: 21,907,391.06
Step by Step Solution
- Step 1: Write the proportion equation
28,928,355.38 : 39,920,231.12 = 15,875,278.68 : x - Step 2: Convert to fraction form
28,928,355.38/39,920,231.12 = 15,875,278.68/x - Step 3: Cross multiply
28,928,355.38x = 39,920,231.12 × 15,875,278.68 - Step 4: Simplify right side
28,928,355.38x = 633,744,794,000,008.50 - Step 5: Solve for x
x = 633,744,794,000,008.50/28,928,355.38 - Step 6: Final answer
x = 21,907,391.06
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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.