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Finding the Fourth Proportional to 18,668,998.60, 28,003,497.90 and 16,684,952.20

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Solution

The fourth proportional to 18,668,998.60, 28,003,497.90 and 16,684,952.20 is: 25,027,428.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668,998.60 : 28,003,497.90 = 16,684,952.20 : x
  2. Step 2: Convert to fraction form
    18,668,998.60/28,003,497.90 = 16,684,952.20/x
  3. Step 3: Cross multiply
    18,668,998.60x = 28,003,497.90 × 16,684,952.20
  4. Step 4: Simplify right side
    18,668,998.60x = 467,237,023,894,300.31
  5. Step 5: Solve for x
    x = 467,237,023,894,300.31/18,668,998.60
  6. Step 6: Final answer
    x = 25,027,428.30

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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.