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Finding the Third Proportional to 11.66 and 21.19

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Solution

The third proportional to 11.66 and 21.19 is: 38.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.66 : 21.19 = 21.19 : x
  2. Step 2: Convert to fraction form
    11.66/21.19 = 21.19/x
  3. Step 3: Cross multiply
    11.66x = 21.19 × 21.19
  4. Step 4: Simplify right side
    11.66x = 449.08
  5. Step 5: Solve for x
    x = 449.08/11.66
  6. Step 6: Final answer
    x = 38.53

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Why These Related Problems?

These problems maintain the same ratio (1.82) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.