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Finding the Fourth Proportional to 10.86, 14.97 and 9.39

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Solution

The fourth proportional to 10.86, 14.97 and 9.39 is: 12.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.86 : 14.97 = 9.39 : x
  2. Step 2: Convert to fraction form
    10.86/14.97 = 9.39/x
  3. Step 3: Cross multiply
    10.86x = 14.97 × 9.39
  4. Step 4: Simplify right side
    10.86x = 140.57
  5. Step 5: Solve for x
    x = 140.57/10.86
  6. Step 6: Final answer
    x = 12.94

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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.