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Finding the Third Proportional to 12.45 and 17.79

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Solution

The third proportional to 12.45 and 17.79 is: 25.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.45 : 17.79 = 17.79 : x
  2. Step 2: Convert to fraction form
    12.45/17.79 = 17.79/x
  3. Step 3: Cross multiply
    12.45x = 17.79 × 17.79
  4. Step 4: Simplify right side
    12.45x = 316.45
  5. Step 5: Solve for x
    x = 316.45/12.45
  6. Step 6: Final answer
    x = 25.43

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.