Home / 18,321.18-27,479.28-5,174.61

Finding the Fourth Proportional to 18,321.18, 27,479.28 and 5,174.61

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Solution

The fourth proportional to 18,321.18, 27,479.28 and 5,174.61 is: 7,761.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,321.18 : 27,479.28 = 5,174.61 : x
  2. Step 2: Convert to fraction form
    18,321.18/27,479.28 = 5,174.61/x
  3. Step 3: Cross multiply
    18,321.18x = 27,479.28 × 5,174.61
  4. Step 4: Simplify right side
    18,321.18x = 142,194,557.08
  5. Step 5: Solve for x
    x = 142,194,557.08/18,321.18
  6. Step 6: Final answer
    x = 7,761.21

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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.