Home / 20,809,772.86-31,152,468.19-12,587,532.11

Finding the Fourth Proportional to 20,809,772.86, 31,152,468.19 and 12,587,532.11

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Solution

The fourth proportional to 20,809,772.86, 31,152,468.19 and 12,587,532.11 is: 18,843,679.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809,772.86 : 31,152,468.19 = 12,587,532.11 : x
  2. Step 2: Convert to fraction form
    20,809,772.86/31,152,468.19 = 12,587,532.11/x
  3. Step 3: Cross multiply
    20,809,772.86x = 31,152,468.19 × 12,587,532.11
  4. Step 4: Simplify right side
    20,809,772.86x = 392,132,693,647,378.56
  5. Step 5: Solve for x
    x = 392,132,693,647,378.56/20,809,772.86
  6. Step 6: Final answer
    x = 18,843,679.66

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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.