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Finding the Fourth Proportional to 8,408.52, 12,615 and 7,490.38

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Solution

The fourth proportional to 8,408.52, 12,615 and 7,490.38 is: 11,237.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,408.52 : 12,615 = 7,490.38 : x
  2. Step 2: Convert to fraction form
    8,408.52/12,615 = 7,490.38/x
  3. Step 3: Cross multiply
    8,408.52x = 12,615 × 7,490.38
  4. Step 4: Simplify right side
    8,408.52x = 94,491,143.70
  5. Step 5: Solve for x
    x = 94,491,143.70/8,408.52
  6. Step 6: Final answer
    x = 11,237.55

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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.