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Finding the Fourth Proportional to 8,136.78, 12,204.90 and 3,453.78

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Solution

The fourth proportional to 8,136.78, 12,204.90 and 3,453.78 is: 5,180.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,136.78 : 12,204.90 = 3,453.78 : x
  2. Step 2: Convert to fraction form
    8,136.78/12,204.90 = 3,453.78/x
  3. Step 3: Cross multiply
    8,136.78x = 12,204.90 × 3,453.78
  4. Step 4: Simplify right side
    8,136.78x = 42,153,039.52
  5. Step 5: Solve for x
    x = 42,153,039.52/8,136.78
  6. Step 6: Final answer
    x = 5,180.56

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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.