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Finding the Fourth Proportional to 8,408.56, 12,611.52 and 3,213.28

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Solution

The fourth proportional to 8,408.56, 12,611.52 and 3,213.28 is: 4,819.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,408.56 : 12,611.52 = 3,213.28 : x
  2. Step 2: Convert to fraction form
    8,408.56/12,611.52 = 3,213.28/x
  3. Step 3: Cross multiply
    8,408.56x = 12,611.52 × 3,213.28
  4. Step 4: Simplify right side
    8,408.56x = 40,524,344.99
  5. Step 5: Solve for x
    x = 40,524,344.99/8,408.56
  6. Step 6: Final answer
    x = 4,819.42

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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.