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Finding the Fourth Proportional to 18,934,809.60, 28,402,214.40 and 15,911,500.80

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Solution

The fourth proportional to 18,934,809.60, 28,402,214.40 and 15,911,500.80 is: 23,867,251.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,934,809.60 : 28,402,214.40 = 15,911,500.80 : x
  2. Step 2: Convert to fraction form
    18,934,809.60/28,402,214.40 = 15,911,500.80/x
  3. Step 3: Cross multiply
    18,934,809.60x = 28,402,214.40 × 15,911,500.80
  4. Step 4: Simplify right side
    18,934,809.60x = 451,921,857,147,371.50
  5. Step 5: Solve for x
    x = 451,921,857,147,371.50/18,934,809.60
  6. Step 6: Final answer
    x = 23,867,251.20

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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.