Home / 8,147.85-12,217.62-3,981.61

Finding the Fourth Proportional to 8,147.85, 12,217.62 and 3,981.61

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Solution

The fourth proportional to 8,147.85, 12,217.62 and 3,981.61 is: 5,970.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,147.85 : 12,217.62 = 3,981.61 : x
  2. Step 2: Convert to fraction form
    8,147.85/12,217.62 = 3,981.61/x
  3. Step 3: Cross multiply
    8,147.85x = 12,217.62 × 3,981.61
  4. Step 4: Simplify right side
    8,147.85x = 48,645,797.97
  5. Step 5: Solve for x
    x = 48,645,797.97/8,147.85
  6. Step 6: Final answer
    x = 5,970.38

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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.