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Finding the Fourth Proportional to 18,377,978.20, 27,566,967.30 and 7,591,694.20

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Solution

The fourth proportional to 18,377,978.20, 27,566,967.30 and 7,591,694.20 is: 11,387,541.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,377,978.20 : 27,566,967.30 = 7,591,694.20 : x
  2. Step 2: Convert to fraction form
    18,377,978.20/27,566,967.30 = 7,591,694.20/x
  3. Step 3: Cross multiply
    18,377,978.20x = 27,566,967.30 × 7,591,694.20
  4. Step 4: Simplify right side
    18,377,978.20x = 209,279,985,762,999.66
  5. Step 5: Solve for x
    x = 209,279,985,762,999.66/18,377,978.20
  6. Step 6: Final answer
    x = 11,387,541.30

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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.