Home / 20,687.76-28,529.25-13,897.14

Finding the Fourth Proportional to 20,687.76, 28,529.25 and 13,897.14

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Solution

The fourth proportional to 20,687.76, 28,529.25 and 13,897.14 is: 19,164.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.76 : 28,529.25 = 13,897.14 : x
  2. Step 2: Convert to fraction form
    20,687.76/28,529.25 = 13,897.14/x
  3. Step 3: Cross multiply
    20,687.76x = 28,529.25 × 13,897.14
  4. Step 4: Simplify right side
    20,687.76x = 396,474,981.35
  5. Step 5: Solve for x
    x = 396,474,981.35/20,687.76
  6. Step 6: Final answer
    x = 19,164.71

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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.