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Finding the Fourth Proportional to 18,721,809.60, 28,026,727.20 and 17,614,507.20

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Solution

The fourth proportional to 18,721,809.60, 28,026,727.20 and 17,614,507.20 is: 26,369,084.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721,809.60 : 28,026,727.20 = 17,614,507.20 : x
  2. Step 2: Convert to fraction form
    18,721,809.60/28,026,727.20 = 17,614,507.20/x
  3. Step 3: Cross multiply
    18,721,809.60x = 28,026,727.20 × 17,614,507.20
  4. Step 4: Simplify right side
    18,721,809.60x = 493,676,988,056,835.81
  5. Step 5: Solve for x
    x = 493,676,988,056,835.81/18,721,809.60
  6. Step 6: Final answer
    x = 26,369,084.97

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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.