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Finding the Third Proportional to 16,921 and 36,723

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Solution

The third proportional to 16,921 and 36,723 is: 79,698.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,921 : 36,723 = 36,723 : x
  2. Step 2: Convert to fraction form
    16,921/36,723 = 36,723/x
  3. Step 3: Cross multiply
    16,921x = 36,723 × 36,723
  4. Step 4: Simplify right side
    16,921x = 1,348,578,729
  5. Step 5: Solve for x
    x = 1,348,578,729/16,921
  6. Step 6: Final answer
    x = 79,698.52

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.