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Finding the Fourth Proportional to 18,474.78, 27,712.17 and 8,618.70

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Solution

The fourth proportional to 18,474.78, 27,712.17 and 8,618.70 is: 12,928.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,474.78 : 27,712.17 = 8,618.70 : x
  2. Step 2: Convert to fraction form
    18,474.78/27,712.17 = 8,618.70/x
  3. Step 3: Cross multiply
    18,474.78x = 27,712.17 × 8,618.70
  4. Step 4: Simplify right side
    18,474.78x = 238,842,879.58
  5. Step 5: Solve for x
    x = 238,842,879.58/18,474.78
  6. Step 6: Final answer
    x = 12,928.05

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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.