Home / 8,257.28-12,390.17-5,485.86

Finding the Fourth Proportional to 8,257.28, 12,390.17 and 5,485.86

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Solution

The fourth proportional to 8,257.28, 12,390.17 and 5,485.86 is: 8,231.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,257.28 : 12,390.17 = 5,485.86 : x
  2. Step 2: Convert to fraction form
    8,257.28/12,390.17 = 5,485.86/x
  3. Step 3: Cross multiply
    8,257.28x = 12,390.17 × 5,485.86
  4. Step 4: Simplify right side
    8,257.28x = 67,970,738.00
  5. Step 5: Solve for x
    x = 67,970,738.00/8,257.28
  6. Step 6: Final answer
    x = 8,231.61

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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.