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Finding the Fourth Proportional to 18,555.62, 27,831.20 and 5,229.61

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Solution

The fourth proportional to 18,555.62, 27,831.20 and 5,229.61 is: 7,843.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,555.62 : 27,831.20 = 5,229.61 : x
  2. Step 2: Convert to fraction form
    18,555.62/27,831.20 = 5,229.61/x
  3. Step 3: Cross multiply
    18,555.62x = 27,831.20 × 5,229.61
  4. Step 4: Simplify right side
    18,555.62x = 145,546,382.66
  5. Step 5: Solve for x
    x = 145,546,382.66/18,555.62
  6. Step 6: Final answer
    x = 7,843.79

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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.