Home / 20,997.53-28,963.56-12,493.90

Finding the Fourth Proportional to 20,997.53, 28,963.56 and 12,493.90

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Solution

The fourth proportional to 20,997.53, 28,963.56 and 12,493.90 is: 17,233.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.53 : 28,963.56 = 12,493.90 : x
  2. Step 2: Convert to fraction form
    20,997.53/28,963.56 = 12,493.90/x
  3. Step 3: Cross multiply
    20,997.53x = 28,963.56 × 12,493.90
  4. Step 4: Simplify right side
    20,997.53x = 361,867,822.28
  5. Step 5: Solve for x
    x = 361,867,822.28/20,997.53
  6. Step 6: Final answer
    x = 17,233.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.