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Finding the Fourth Proportional to 11.46, 15.82 and 6.61

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Solution

The fourth proportional to 11.46, 15.82 and 6.61 is: 9.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.46 : 15.82 = 6.61 : x
  2. Step 2: Convert to fraction form
    11.46/15.82 = 6.61/x
  3. Step 3: Cross multiply
    11.46x = 15.82 × 6.61
  4. Step 4: Simplify right side
    11.46x = 104.54
  5. Step 5: Solve for x
    x = 104.54/11.46
  6. Step 6: Final answer
    x = 9.12

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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.