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Finding the Third Proportional to 21,208 and 33,685

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Solution

The third proportional to 21,208 and 33,685 is: 53,502.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,208 : 33,685 = 33,685 : x
  2. Step 2: Convert to fraction form
    21,208/33,685 = 33,685/x
  3. Step 3: Cross multiply
    21,208x = 33,685 × 33,685
  4. Step 4: Simplify right side
    21,208x = 1,134,679,225
  5. Step 5: Solve for x
    x = 1,134,679,225/21,208
  6. Step 6: Final answer
    x = 53,502.42

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.