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Finding the Fourth Proportional to 12,372.62, 18,534.18 and 7,439.54

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Solution

The fourth proportional to 12,372.62, 18,534.18 and 7,439.54 is: 11,144.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,372.62 : 18,534.18 = 7,439.54 : x
  2. Step 2: Convert to fraction form
    12,372.62/18,534.18 = 7,439.54/x
  3. Step 3: Cross multiply
    12,372.62x = 18,534.18 × 7,439.54
  4. Step 4: Simplify right side
    12,372.62x = 137,885,773.48
  5. Step 5: Solve for x
    x = 137,885,773.48/12,372.62
  6. Step 6: Final answer
    x = 11,144.43

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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.