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Finding the Fourth Proportional to 18,309.60, 27,468.99 and 8,455.86

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Solution

The fourth proportional to 18,309.60, 27,468.99 and 8,455.86 is: 12,685.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,309.60 : 27,468.99 = 8,455.86 : x
  2. Step 2: Convert to fraction form
    18,309.60/27,468.99 = 8,455.86/x
  3. Step 3: Cross multiply
    18,309.60x = 27,468.99 × 8,455.86
  4. Step 4: Simplify right side
    18,309.60x = 232,273,933.78
  5. Step 5: Solve for x
    x = 232,273,933.78/18,309.60
  6. Step 6: Final answer
    x = 12,685.91

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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.