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Finding the Fourth Proportional to 12.05, 16.60 and 10.82

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Solution

The fourth proportional to 12.05, 16.60 and 10.82 is: 14.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.05 : 16.60 = 10.82 : x
  2. Step 2: Convert to fraction form
    12.05/16.60 = 10.82/x
  3. Step 3: Cross multiply
    12.05x = 16.60 × 10.82
  4. Step 4: Simplify right side
    12.05x = 179.56
  5. Step 5: Solve for x
    x = 179.56/12.05
  6. Step 6: Final answer
    x = 14.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.