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Finding the Fourth Proportional to 18,251.76, 27,379.38 and 8,393.78

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Solution

The fourth proportional to 18,251.76, 27,379.38 and 8,393.78 is: 12,591.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,251.76 : 27,379.38 = 8,393.78 : x
  2. Step 2: Convert to fraction form
    18,251.76/27,379.38 = 8,393.78/x
  3. Step 3: Cross multiply
    18,251.76x = 27,379.38 × 8,393.78
  4. Step 4: Simplify right side
    18,251.76x = 229,816,492.26
  5. Step 5: Solve for x
    x = 229,816,492.26/18,251.76
  6. Step 6: Final answer
    x = 12,591.47

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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.