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Finding the Fourth Proportional to 20,660.52, 28,511.52 and 11,229.14

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Solution

The fourth proportional to 20,660.52, 28,511.52 and 11,229.14 is: 15,496.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.52 : 28,511.52 = 11,229.14 : x
  2. Step 2: Convert to fraction form
    20,660.52/28,511.52 = 11,229.14/x
  3. Step 3: Cross multiply
    20,660.52x = 28,511.52 × 11,229.14
  4. Step 4: Simplify right side
    20,660.52x = 320,159,849.69
  5. Step 5: Solve for x
    x = 320,159,849.69/20,660.52
  6. Step 6: Final answer
    x = 15,496.21

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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.