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Finding the Fourth Proportional to 18,022.60, 27,018.24 and 8,657.92

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Solution

The fourth proportional to 18,022.60, 27,018.24 and 8,657.92 is: 12,979.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,022.60 : 27,018.24 = 8,657.92 : x
  2. Step 2: Convert to fraction form
    18,022.60/27,018.24 = 8,657.92/x
  3. Step 3: Cross multiply
    18,022.60x = 27,018.24 × 8,657.92
  4. Step 4: Simplify right side
    18,022.60x = 233,921,760.46
  5. Step 5: Solve for x
    x = 233,921,760.46/18,022.60
  6. Step 6: Final answer
    x = 12,979.36

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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.