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Finding the Third Proportional to 5.91 and 11.39

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Solution

The third proportional to 5.91 and 11.39 is: 21.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.91 : 11.39 = 11.39 : x
  2. Step 2: Convert to fraction form
    5.91/11.39 = 11.39/x
  3. Step 3: Cross multiply
    5.91x = 11.39 × 11.39
  4. Step 4: Simplify right side
    5.91x = 129.75
  5. Step 5: Solve for x
    x = 129.75/5.91
  6. Step 6: Final answer
    x = 21.97

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Why These Related Problems?

These problems maintain the same ratio (1.93) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.