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Finding the Fourth Proportional to 8,137.20, 12,203.40 and 3,205.20

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Solution

The fourth proportional to 8,137.20, 12,203.40 and 3,205.20 is: 4,806.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,137.20 : 12,203.40 = 3,205.20 : x
  2. Step 2: Convert to fraction form
    8,137.20/12,203.40 = 3,205.20/x
  3. Step 3: Cross multiply
    8,137.20x = 12,203.40 × 3,205.20
  4. Step 4: Simplify right side
    8,137.20x = 39,114,337.68
  5. Step 5: Solve for x
    x = 39,114,337.68/8,137.20
  6. Step 6: Final answer
    x = 4,806.85

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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.