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Finding the Fourth Proportional to 18,924,943.01, 28,446,671.10 and 12,489,374.70

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Solution

The fourth proportional to 18,924,943.01, 28,446,671.10 and 12,489,374.70 is: 18,773,168.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,924,943.01 : 28,446,671.10 = 12,489,374.70 : x
  2. Step 2: Convert to fraction form
    18,924,943.01/28,446,671.10 = 12,489,374.70/x
  3. Step 3: Cross multiply
    18,924,943.01x = 28,446,671.10 × 12,489,374.70
  4. Step 4: Simplify right side
    18,924,943.01x = 355,281,134,335,561.19
  5. Step 5: Solve for x
    x = 355,281,134,335,561.19/18,924,943.01
  6. Step 6: Final answer
    x = 18,773,168.00

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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.