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Finding the Fourth Proportional to 12,108.55, 18,162.71 and 7,174.64

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Solution

The fourth proportional to 12,108.55, 18,162.71 and 7,174.64 is: 10,761.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,108.55 : 18,162.71 = 7,174.64 : x
  2. Step 2: Convert to fraction form
    12,108.55/18,162.71 = 7,174.64/x
  3. Step 3: Cross multiply
    12,108.55x = 18,162.71 × 7,174.64
  4. Step 4: Simplify right side
    12,108.55x = 130,310,778.99
  5. Step 5: Solve for x
    x = 130,310,778.99/12,108.55
  6. Step 6: Final answer
    x = 10,761.88

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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.