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Finding the Third Proportional to 21,909 and 33,894

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Solution

The third proportional to 21,909 and 33,894 is: 52,435.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,909 : 33,894 = 33,894 : x
  2. Step 2: Convert to fraction form
    21,909/33,894 = 33,894/x
  3. Step 3: Cross multiply
    21,909x = 33,894 × 33,894
  4. Step 4: Simplify right side
    21,909x = 1,148,803,236
  5. Step 5: Solve for x
    x = 1,148,803,236/21,909
  6. Step 6: Final answer
    x = 52,435.22

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.