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Finding the Fourth Proportional to 18,029.61, 27,031.46 and 8,163.81

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Solution

The fourth proportional to 18,029.61, 27,031.46 and 8,163.81 is: 12,239.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,029.61 : 27,031.46 = 8,163.81 : x
  2. Step 2: Convert to fraction form
    18,029.61/27,031.46 = 8,163.81/x
  3. Step 3: Cross multiply
    18,029.61x = 27,031.46 × 8,163.81
  4. Step 4: Simplify right side
    18,029.61x = 220,679,662.64
  5. Step 5: Solve for x
    x = 220,679,662.64/18,029.61
  6. Step 6: Final answer
    x = 12,239.85

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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.