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Finding the Third Proportional to 9.75 and 21.97

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Solution

The third proportional to 9.75 and 21.97 is: 49.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    9.75 : 21.97 = 21.97 : x
  2. Step 2: Convert to fraction form
    9.75/21.97 = 21.97/x
  3. Step 3: Cross multiply
    9.75x = 21.97 × 21.97
  4. Step 4: Simplify right side
    9.75x = 482.63
  5. Step 5: Solve for x
    x = 482.63/9.75
  6. Step 6: Final answer
    x = 49.50

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Why These Related Problems?

These problems maintain the same ratio (2.25) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.