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Finding the Third Proportional to 12.66 and 27.21

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Solution

The third proportional to 12.66 and 27.21 is: 58.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.66 : 27.21 = 27.21 : x
  2. Step 2: Convert to fraction form
    12.66/27.21 = 27.21/x
  3. Step 3: Cross multiply
    12.66x = 27.21 × 27.21
  4. Step 4: Simplify right side
    12.66x = 740.44
  5. Step 5: Solve for x
    x = 740.44/12.66
  6. Step 6: Final answer
    x = 58.50

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.