Home / 20,901,909.20-31,376,483.40-12,387,043.40

Finding the Fourth Proportional to 20,901,909.20, 31,376,483.40 and 12,387,043.40

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Solution

The fourth proportional to 20,901,909.20, 31,376,483.40 and 12,387,043.40 is: 18,594,562.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901,909.20 : 31,376,483.40 = 12,387,043.40 : x
  2. Step 2: Convert to fraction form
    20,901,909.20/31,376,483.40 = 12,387,043.40/x
  3. Step 3: Cross multiply
    20,901,909.20x = 31,376,483.40 × 12,387,043.40
  4. Step 4: Simplify right side
    20,901,909.20x = 388,661,861,615,179.56
  5. Step 5: Solve for x
    x = 388,661,861,615,179.56/20,901,909.20
  6. Step 6: Final answer
    x = 18,594,562.72

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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.