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Finding the Fourth Proportional to 20,029.20, 27,639 and 12,073.20

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Solution

The fourth proportional to 20,029.20, 27,639 and 12,073.20 is: 16,660.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,029.20 : 27,639 = 12,073.20 : x
  2. Step 2: Convert to fraction form
    20,029.20/27,639 = 12,073.20/x
  3. Step 3: Cross multiply
    20,029.20x = 27,639 × 12,073.20
  4. Step 4: Simplify right side
    20,029.20x = 333,691,174.80
  5. Step 5: Solve for x
    x = 333,691,174.80/20,029.20
  6. Step 6: Final answer
    x = 16,660.23

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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.