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Finding the Fourth Proportional to 18,753.29, 28,137.69 and 8,217.87

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Solution

The fourth proportional to 18,753.29, 28,137.69 and 8,217.87 is: 12,330.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753.29 : 28,137.69 = 8,217.87 : x
  2. Step 2: Convert to fraction form
    18,753.29/28,137.69 = 8,217.87/x
  3. Step 3: Cross multiply
    18,753.29x = 28,137.69 × 8,217.87
  4. Step 4: Simplify right side
    18,753.29x = 231,231,878.52
  5. Step 5: Solve for x
    x = 231,231,878.52/18,753.29
  6. Step 6: Final answer
    x = 12,330.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.