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Finding the Fourth Proportional to 9,408.62, 12,984.32 and 5,375.80

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Solution

The fourth proportional to 9,408.62, 12,984.32 and 5,375.80 is: 7,418.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,408.62 : 12,984.32 = 5,375.80 : x
  2. Step 2: Convert to fraction form
    9,408.62/12,984.32 = 5,375.80/x
  3. Step 3: Cross multiply
    9,408.62x = 12,984.32 × 5,375.80
  4. Step 4: Simplify right side
    9,408.62x = 69,801,107.46
  5. Step 5: Solve for x
    x = 69,801,107.46/9,408.62
  6. Step 6: Final answer
    x = 7,418.85

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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.