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Finding the Third Proportional to 21,149 and 27,816

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Solution

The third proportional to 21,149 and 27,816 is: 36,584.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,149 : 27,816 = 27,816 : x
  2. Step 2: Convert to fraction form
    21,149/27,816 = 27,816/x
  3. Step 3: Cross multiply
    21,149x = 27,816 × 27,816
  4. Step 4: Simplify right side
    21,149x = 773,729,856
  5. Step 5: Solve for x
    x = 773,729,856/21,149
  6. Step 6: Final answer
    x = 36,584.70

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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.