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Finding the Third Proportional to 21,186 and 40,448

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Solution

The third proportional to 21,186 and 40,448 is: 77,222.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186 : 40,448 = 40,448 : x
  2. Step 2: Convert to fraction form
    21,186/40,448 = 40,448/x
  3. Step 3: Cross multiply
    21,186x = 40,448 × 40,448
  4. Step 4: Simplify right side
    21,186x = 1,636,040,704
  5. Step 5: Solve for x
    x = 1,636,040,704/21,186
  6. Step 6: Final answer
    x = 77,222.73

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Why These Related Problems?

These problems maintain the same ratio (1.91) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.