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Finding the Third Proportional to 21,561 and 33,306

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Solution

The third proportional to 21,561 and 33,306 is: 51,448.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,561 : 33,306 = 33,306 : x
  2. Step 2: Convert to fraction form
    21,561/33,306 = 33,306/x
  3. Step 3: Cross multiply
    21,561x = 33,306 × 33,306
  4. Step 4: Simplify right side
    21,561x = 1,109,289,636
  5. Step 5: Solve for x
    x = 1,109,289,636/21,561
  6. Step 6: Final answer
    x = 51,448.90

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.