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Finding the Fourth Proportional to 9.39, 14.13 and 7.71

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Solution

The fourth proportional to 9.39, 14.13 and 7.71 is: 11.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9.39 : 14.13 = 7.71 : x
  2. Step 2: Convert to fraction form
    9.39/14.13 = 7.71/x
  3. Step 3: Cross multiply
    9.39x = 14.13 × 7.71
  4. Step 4: Simplify right side
    9.39x = 108.94
  5. Step 5: Solve for x
    x = 108.94/9.39
  6. Step 6: Final answer
    x = 11.60

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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.