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Finding the Fourth Proportional to 18,297.28, 27,447.60 and 8,439.28

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Solution

The fourth proportional to 18,297.28, 27,447.60 and 8,439.28 is: 12,659.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,297.28 : 27,447.60 = 8,439.28 : x
  2. Step 2: Convert to fraction form
    18,297.28/27,447.60 = 8,439.28/x
  3. Step 3: Cross multiply
    18,297.28x = 27,447.60 × 8,439.28
  4. Step 4: Simplify right side
    18,297.28x = 231,637,981.73
  5. Step 5: Solve for x
    x = 231,637,981.73/18,297.28
  6. Step 6: Final answer
    x = 12,659.69

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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.