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Finding the Fourth Proportional to 13,381.73, 20,049.94 and 8,100.73

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Solution

The fourth proportional to 13,381.73, 20,049.94 and 8,100.73 is: 12,137.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,381.73 : 20,049.94 = 8,100.73 : x
  2. Step 2: Convert to fraction form
    13,381.73/20,049.94 = 8,100.73/x
  3. Step 3: Cross multiply
    13,381.73x = 20,049.94 × 8,100.73
  4. Step 4: Simplify right side
    13,381.73x = 162,419,150.46
  5. Step 5: Solve for x
    x = 162,419,150.46/13,381.73
  6. Step 6: Final answer
    x = 12,137.38

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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.