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Finding the Fourth Proportional to 18,276.52, 27,378.18 and 8,402.32

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Solution

The fourth proportional to 18,276.52, 27,378.18 and 8,402.32 is: 12,586.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,276.52 : 27,378.18 = 8,402.32 : x
  2. Step 2: Convert to fraction form
    18,276.52/27,378.18 = 8,402.32/x
  3. Step 3: Cross multiply
    18,276.52x = 27,378.18 × 8,402.32
  4. Step 4: Simplify right side
    18,276.52x = 230,040,229.38
  5. Step 5: Solve for x
    x = 230,040,229.38/18,276.52
  6. Step 6: Final answer
    x = 12,586.65

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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.