Home / 20,835.78-28,753.44-11,404.95

Finding the Fourth Proportional to 20,835.78, 28,753.44 and 11,404.95

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Solution

The fourth proportional to 20,835.78, 28,753.44 and 11,404.95 is: 15,738.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,835.78 : 28,753.44 = 11,404.95 : x
  2. Step 2: Convert to fraction form
    20,835.78/28,753.44 = 11,404.95/x
  3. Step 3: Cross multiply
    20,835.78x = 28,753.44 × 11,404.95
  4. Step 4: Simplify right side
    20,835.78x = 327,931,545.53
  5. Step 5: Solve for x
    x = 327,931,545.53/20,835.78
  6. Step 6: Final answer
    x = 15,738.87

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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.