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Finding the Fourth Proportional to 10.67, 15.97 and 6.38

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Solution

The fourth proportional to 10.67, 15.97 and 6.38 is: 9.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.67 : 15.97 = 6.38 : x
  2. Step 2: Convert to fraction form
    10.67/15.97 = 6.38/x
  3. Step 3: Cross multiply
    10.67x = 15.97 × 6.38
  4. Step 4: Simplify right side
    10.67x = 101.89
  5. Step 5: Solve for x
    x = 101.89/10.67
  6. Step 6: Final answer
    x = 9.55

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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.