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Finding the Fourth Proportional to 20,901.23, 28,843.74 and 11,948.97

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Solution

The fourth proportional to 20,901.23, 28,843.74 and 11,948.97 is: 16,489.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901.23 : 28,843.74 = 11,948.97 : x
  2. Step 2: Convert to fraction form
    20,901.23/28,843.74 = 11,948.97/x
  3. Step 3: Cross multiply
    20,901.23x = 28,843.74 × 11,948.97
  4. Step 4: Simplify right side
    20,901.23x = 344,652,983.95
  5. Step 5: Solve for x
    x = 344,652,983.95/20,901.23
  6. Step 6: Final answer
    x = 16,489.61

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1.5x scale

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.