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Finding the Fourth Proportional to 12,163.59, 18,245.90 and 3,843.79

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Solution

The fourth proportional to 12,163.59, 18,245.90 and 3,843.79 is: 5,765.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,163.59 : 18,245.90 = 3,843.79 : x
  2. Step 2: Convert to fraction form
    12,163.59/18,245.90 = 3,843.79/x
  3. Step 3: Cross multiply
    12,163.59x = 18,245.90 × 3,843.79
  4. Step 4: Simplify right side
    12,163.59x = 70,133,371.96
  5. Step 5: Solve for x
    x = 70,133,371.96/12,163.59
  6. Step 6: Final answer
    x = 5,765.84

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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.