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Finding the Fourth Proportional to 12,108.76, 18,163.10 and 3,343.65

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Solution

The fourth proportional to 12,108.76, 18,163.10 and 3,343.65 is: 5,015.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,108.76 : 18,163.10 = 3,343.65 : x
  2. Step 2: Convert to fraction form
    12,108.76/18,163.10 = 3,343.65/x
  3. Step 3: Cross multiply
    12,108.76x = 18,163.10 × 3,343.65
  4. Step 4: Simplify right side
    12,108.76x = 60,730,989.56
  5. Step 5: Solve for x
    x = 60,730,989.56/12,108.76
  6. Step 6: Final answer
    x = 5,015.46

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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.