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Finding the Fourth Proportional to 12,136.85, 18,205.27 and 6,939.08

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Solution

The fourth proportional to 12,136.85, 18,205.27 and 6,939.08 is: 10,408.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,136.85 : 18,205.27 = 6,939.08 : x
  2. Step 2: Convert to fraction form
    12,136.85/18,205.27 = 6,939.08/x
  3. Step 3: Cross multiply
    12,136.85x = 18,205.27 × 6,939.08
  4. Step 4: Simplify right side
    12,136.85x = 126,327,824.95
  5. Step 5: Solve for x
    x = 126,327,824.95/12,136.85
  6. Step 6: Final answer
    x = 10,408.62

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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.