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Finding the Third Proportional to 7.98 and 12.54

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Solution

The third proportional to 7.98 and 12.54 is: 19.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.98 : 12.54 = 12.54 : x
  2. Step 2: Convert to fraction form
    7.98/12.54 = 12.54/x
  3. Step 3: Cross multiply
    7.98x = 12.54 × 12.54
  4. Step 4: Simplify right side
    7.98x = 157.35
  5. Step 5: Solve for x
    x = 157.35/7.98
  6. Step 6: Final answer
    x = 19.71

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.