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Finding the Fourth Proportional to 8,151.10, 12,230.70 and 3,220.90

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Solution

The fourth proportional to 8,151.10, 12,230.70 and 3,220.90 is: 4,832.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,151.10 : 12,230.70 = 3,220.90 : x
  2. Step 2: Convert to fraction form
    8,151.10/12,230.70 = 3,220.90/x
  3. Step 3: Cross multiply
    8,151.10x = 12,230.70 × 3,220.90
  4. Step 4: Simplify right side
    8,151.10x = 39,393,861.63
  5. Step 5: Solve for x
    x = 39,393,861.63/8,151.10
  6. Step 6: Final answer
    x = 4,832.95

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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.