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Finding the Fourth Proportional to 20,901.44, 28,843.97 and 11,949.14

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Solution

The fourth proportional to 20,901.44, 28,843.97 and 11,949.14 is: 16,489.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901.44 : 28,843.97 = 11,949.14 : x
  2. Step 2: Convert to fraction form
    20,901.44/28,843.97 = 11,949.14/x
  3. Step 3: Cross multiply
    20,901.44x = 28,843.97 × 11,949.14
  4. Step 4: Simplify right side
    20,901.44x = 344,660,431.72
  5. Step 5: Solve for x
    x = 344,660,431.72/20,901.44
  6. Step 6: Final answer
    x = 16,489.80

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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.