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Finding the Fourth Proportional to 18,667,713.10, 28,001,569.65 and 17,072,077.90

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Solution

The fourth proportional to 18,667,713.10, 28,001,569.65 and 17,072,077.90 is: 25,608,116.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,667,713.10 : 28,001,569.65 = 17,072,077.90 : x
  2. Step 2: Convert to fraction form
    18,667,713.10/28,001,569.65 = 17,072,077.90/x
  3. Step 3: Cross multiply
    18,667,713.10x = 28,001,569.65 × 17,072,077.90
  4. Step 4: Simplify right side
    18,667,713.10x = 478,044,978,387,075.69
  5. Step 5: Solve for x
    x = 478,044,978,387,075.69/18,667,713.10
  6. Step 6: Final answer
    x = 25,608,116.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.