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Finding the Fourth Proportional to 12,408.62, 17,121.96 and 7,372.71

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Solution

The fourth proportional to 12,408.62, 17,121.96 and 7,372.71 is: 10,173.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,408.62 : 17,121.96 = 7,372.71 : x
  2. Step 2: Convert to fraction form
    12,408.62/17,121.96 = 7,372.71/x
  3. Step 3: Cross multiply
    12,408.62x = 17,121.96 × 7,372.71
  4. Step 4: Simplify right side
    12,408.62x = 126,235,245.71
  5. Step 5: Solve for x
    x = 126,235,245.71/12,408.62
  6. Step 6: Final answer
    x = 10,173.19

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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.