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Finding the Fourth Proportional to 11.87, 16.31 and 9.44

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Solution

The fourth proportional to 11.87, 16.31 and 9.44 is: 12.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.87 : 16.31 = 9.44 : x
  2. Step 2: Convert to fraction form
    11.87/16.31 = 9.44/x
  3. Step 3: Cross multiply
    11.87x = 16.31 × 9.44
  4. Step 4: Simplify right side
    11.87x = 153.84
  5. Step 5: Solve for x
    x = 153.84/11.87
  6. Step 6: Final answer
    x = 12.97

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.