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Finding the Third Proportional to 10.97 and 21.78

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Solution

The third proportional to 10.97 and 21.78 is: 43.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.97 : 21.78 = 21.78 : x
  2. Step 2: Convert to fraction form
    10.97/21.78 = 21.78/x
  3. Step 3: Cross multiply
    10.97x = 21.78 × 21.78
  4. Step 4: Simplify right side
    10.97x = 474.34
  5. Step 5: Solve for x
    x = 474.34/10.97
  6. Step 6: Final answer
    x = 43.24

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Why These Related Problems?

These problems maintain the same ratio (1.99) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.