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Finding the Fourth Proportional to 12,375.62, 18,538.68 and 7,442.54

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Solution

The fourth proportional to 12,375.62, 18,538.68 and 7,442.54 is: 11,148.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,375.62 : 18,538.68 = 7,442.54 : x
  2. Step 2: Convert to fraction form
    12,375.62/18,538.68 = 7,442.54/x
  3. Step 3: Cross multiply
    12,375.62x = 18,538.68 × 7,442.54
  4. Step 4: Simplify right side
    12,375.62x = 137,974,867.45
  5. Step 5: Solve for x
    x = 137,974,867.45/12,375.62
  6. Step 6: Final answer
    x = 11,148.93

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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.