Finding the Fourth Proportional to 28,248,946.72, 38,982,218.58 and 15,690,815.92
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Solution
The fourth proportional to 28,248,946.72, 38,982,218.58 and 15,690,815.92 is: 21,652,588.39
Step by Step Solution
- Step 1: Write the proportion equation
28,248,946.72 : 38,982,218.58 = 15,690,815.92 : x - Step 2: Convert to fraction form
28,248,946.72/38,982,218.58 = 15,690,815.92/x - Step 3: Cross multiply
28,248,946.72x = 38,982,218.58 × 15,690,815.92 - Step 4: Simplify right side
28,248,946.72x = 611,662,815,891,983.75 - Step 5: Solve for x
x = 611,662,815,891,983.75/28,248,946.72 - Step 6: Final answer
x = 21,652,588.39
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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.