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Finding the Fourth Proportional to 8,136.80, 12,205.20 and 3,203.76

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Solution

The fourth proportional to 8,136.80, 12,205.20 and 3,203.76 is: 4,805.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,136.80 : 12,205.20 = 3,203.76 : x
  2. Step 2: Convert to fraction form
    8,136.80/12,205.20 = 3,203.76/x
  3. Step 3: Cross multiply
    8,136.80x = 12,205.20 × 3,203.76
  4. Step 4: Simplify right side
    8,136.80x = 39,102,531.55
  5. Step 5: Solve for x
    x = 39,102,531.55/8,136.80
  6. Step 6: Final answer
    x = 4,805.64

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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.