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Finding the Third Proportional to 11.67 and 15.05

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Solution

The third proportional to 11.67 and 15.05 is: 19.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.67 : 15.05 = 15.05 : x
  2. Step 2: Convert to fraction form
    11.67/15.05 = 15.05/x
  3. Step 3: Cross multiply
    11.67x = 15.05 × 15.05
  4. Step 4: Simplify right side
    11.67x = 226.41
  5. Step 5: Solve for x
    x = 226.41/11.67
  6. Step 6: Final answer
    x = 19.40

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Why These Related Problems?

These problems maintain the same ratio (1.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.