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Finding the Fourth Proportional to 12,543.11, 17,321.17 and 8,074.60

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Solution

The fourth proportional to 12,543.11, 17,321.17 and 8,074.60 is: 11,150.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,543.11 : 17,321.17 = 8,074.60 : x
  2. Step 2: Convert to fraction form
    12,543.11/17,321.17 = 8,074.60/x
  3. Step 3: Cross multiply
    12,543.11x = 17,321.17 × 8,074.60
  4. Step 4: Simplify right side
    12,543.11x = 139,861,478.91
  5. Step 5: Solve for x
    x = 139,861,478.91/12,543.11
  6. Step 6: Final answer
    x = 11,150.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.