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Finding the Third Proportional to 9.75 and 20.48

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Solution

The third proportional to 9.75 and 20.48 is: 43.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    9.75 : 20.48 = 20.48 : x
  2. Step 2: Convert to fraction form
    9.75/20.48 = 20.48/x
  3. Step 3: Cross multiply
    9.75x = 20.48 × 20.48
  4. Step 4: Simplify right side
    9.75x = 419.61
  5. Step 5: Solve for x
    x = 419.61/9.75
  6. Step 6: Final answer
    x = 43.04

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.