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Finding the Third Proportional to 20,169 and 31,332

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Solution

The third proportional to 20,169 and 31,332 is: 48,673.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,169 : 31,332 = 31,332 : x
  2. Step 2: Convert to fraction form
    20,169/31,332 = 31,332/x
  3. Step 3: Cross multiply
    20,169x = 31,332 × 31,332
  4. Step 4: Simplify right side
    20,169x = 981,694,224
  5. Step 5: Solve for x
    x = 981,694,224/20,169
  6. Step 6: Final answer
    x = 48,673.42

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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.