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Finding the Fourth Proportional to 18,909,787.80, 28,322,691.30 and 16,390,363.80

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Solution

The fourth proportional to 18,909,787.80, 28,322,691.30 and 16,390,363.80 is: 24,549,149.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,909,787.80 : 28,322,691.30 = 16,390,363.80 : x
  2. Step 2: Convert to fraction form
    18,909,787.80/28,322,691.30 = 16,390,363.80/x
  3. Step 3: Cross multiply
    18,909,787.80x = 28,322,691.30 × 16,390,363.80
  4. Step 4: Simplify right side
    18,909,787.80x = 464,219,214,202,095
  5. Step 5: Solve for x
    x = 464,219,214,202,095/18,909,787.80
  6. Step 6: Final answer
    x = 24,549,149.84

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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.