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Finding the Third Proportional to 12.56 and 30.61

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Solution

The third proportional to 12.56 and 30.61 is: 74.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.56 : 30.61 = 30.61 : x
  2. Step 2: Convert to fraction form
    12.56/30.61 = 30.61/x
  3. Step 3: Cross multiply
    12.56x = 30.61 × 30.61
  4. Step 4: Simplify right side
    12.56x = 936.93
  5. Step 5: Solve for x
    x = 936.93/12.56
  6. Step 6: Final answer
    x = 74.58

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Why These Related Problems?

These problems maintain the same ratio (2.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.