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Finding the Fourth Proportional to 7,187,796.18, 9,919,363.01 and 3,924,817.56

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Solution

The fourth proportional to 7,187,796.18, 9,919,363.01 and 3,924,817.56 is: 5,416,359.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,187,796.18 : 9,919,363.01 = 3,924,817.56 : x
  2. Step 2: Convert to fraction form
    7,187,796.18/9,919,363.01 = 3,924,817.56/x
  3. Step 3: Cross multiply
    7,187,796.18x = 9,919,363.01 × 3,924,817.56
  4. Step 4: Simplify right side
    7,187,796.18x = 38,931,690,106,038.38
  5. Step 5: Solve for x
    x = 38,931,690,106,038.38/7,187,796.18
  6. Step 6: Final answer
    x = 5,416,359.78

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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.