Home / 20,747.52-31,132.17-12,444.21

Finding the Fourth Proportional to 20,747.52, 31,132.17 and 12,444.21

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Solution

The fourth proportional to 20,747.52, 31,132.17 and 12,444.21 is: 18,672.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.52 : 31,132.17 = 12,444.21 : x
  2. Step 2: Convert to fraction form
    20,747.52/31,132.17 = 12,444.21/x
  3. Step 3: Cross multiply
    20,747.52x = 31,132.17 × 12,444.21
  4. Step 4: Simplify right side
    20,747.52x = 387,415,261.24
  5. Step 5: Solve for x
    x = 387,415,261.24/20,747.52
  6. Step 6: Final answer
    x = 18,672.85

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1.5x scale

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.