Home / 8,251.90-12,378.42-3,321.55

Finding the Fourth Proportional to 8,251.90, 12,378.42 and 3,321.55

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Solution

The fourth proportional to 8,251.90, 12,378.42 and 3,321.55 is: 4,982.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,251.90 : 12,378.42 = 3,321.55 : x
  2. Step 2: Convert to fraction form
    8,251.90/12,378.42 = 3,321.55/x
  3. Step 3: Cross multiply
    8,251.90x = 12,378.42 × 3,321.55
  4. Step 4: Simplify right side
    8,251.90x = 41,115,540.95
  5. Step 5: Solve for x
    x = 41,115,540.95/8,251.90
  6. Step 6: Final answer
    x = 4,982.55

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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.