Finding the Fourth Proportional to 15,772,640.38, 21,757,968.68 and 13,703,005.74
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Solution
The fourth proportional to 15,772,640.38, 21,757,968.68 and 13,703,005.74 is: 18,902,958.70
Step by Step Solution
- Step 1: Write the proportion equation
15,772,640.38 : 21,757,968.68 = 13,703,005.74 : x - Step 2: Convert to fraction form
15,772,640.38/21,757,968.68 = 13,703,005.74/x - Step 3: Cross multiply
15,772,640.38x = 21,757,968.68 × 13,703,005.74 - Step 4: Simplify right side
15,772,640.38x = 298,149,569,712,780.25 - Step 5: Solve for x
x = 298,149,569,712,780.25/15,772,640.38 - Step 6: Final answer
x = 18,902,958.70
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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.