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Finding the Third Proportional to 8,398 and 19,869

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Solution

The third proportional to 8,398 and 19,869 is: 47,008.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,398 : 19,869 = 19,869 : x
  2. Step 2: Convert to fraction form
    8,398/19,869 = 19,869/x
  3. Step 3: Cross multiply
    8,398x = 19,869 × 19,869
  4. Step 4: Simplify right side
    8,398x = 394,777,161
  5. Step 5: Solve for x
    x = 394,777,161/8,398
  6. Step 6: Final answer
    x = 47,008.47

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Why These Related Problems?

These problems maintain the same ratio (2.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.