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Finding the Third Proportional to 21,454 and 33,689

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Solution

The third proportional to 21,454 and 33,689 is: 52,901.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,454 : 33,689 = 33,689 : x
  2. Step 2: Convert to fraction form
    21,454/33,689 = 33,689/x
  3. Step 3: Cross multiply
    21,454x = 33,689 × 33,689
  4. Step 4: Simplify right side
    21,454x = 1,134,948,721
  5. Step 5: Solve for x
    x = 1,134,948,721/21,454
  6. Step 6: Final answer
    x = 52,901.50

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.