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Finding the Fourth Proportional to 18,379.87, 27,572.54 and 8,520.14

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Solution

The fourth proportional to 18,379.87, 27,572.54 and 8,520.14 is: 12,781.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,379.87 : 27,572.54 = 8,520.14 : x
  2. Step 2: Convert to fraction form
    18,379.87/27,572.54 = 8,520.14/x
  3. Step 3: Cross multiply
    18,379.87x = 27,572.54 × 8,520.14
  4. Step 4: Simplify right side
    18,379.87x = 234,921,927.29
  5. Step 5: Solve for x
    x = 234,921,927.29/18,379.87
  6. Step 6: Final answer
    x = 12,781.48

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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.