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Finding the Third Proportional to 21.83 and 28.79

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Solution

The third proportional to 21.83 and 28.79 is: 37.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21.83 : 28.79 = 28.79 : x
  2. Step 2: Convert to fraction form
    21.83/28.79 = 28.79/x
  3. Step 3: Cross multiply
    21.83x = 28.79 × 28.79
  4. Step 4: Simplify right side
    21.83x = 829.04
  5. Step 5: Solve for x
    x = 829.04/21.83
  6. Step 6: Final answer
    x = 37.97

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.