Finding the Fourth Proportional to 28,760,916.38, 39,690,924.12 and 15,708,791.03
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Solution
The fourth proportional to 28,760,916.38, 39,690,924.12 and 15,708,791.03 is: 21,678,601.07
Step by Step Solution
- Step 1: Write the proportion equation
28,760,916.38 : 39,690,924.12 = 15,708,791.03 : x - Step 2: Convert to fraction form
28,760,916.38/39,690,924.12 = 15,708,791.03/x - Step 3: Cross multiply
28,760,916.38x = 39,690,924.12 × 15,708,791.03 - Step 4: Simplify right side
28,760,916.38x = 623,496,432,590,212 - Step 5: Solve for x
x = 623,496,432,590,212/28,760,916.38 - Step 6: Final answer
x = 21,678,601.07
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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.