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Finding the Fourth Proportional to 11.48, 17.31 and 9.89

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Solution

The fourth proportional to 11.48, 17.31 and 9.89 is: 14.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.48 : 17.31 = 9.89 : x
  2. Step 2: Convert to fraction form
    11.48/17.31 = 9.89/x
  3. Step 3: Cross multiply
    11.48x = 17.31 × 9.89
  4. Step 4: Simplify right side
    11.48x = 171.14
  5. Step 5: Solve for x
    x = 171.14/11.48
  6. Step 6: Final answer
    x = 14.91

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.