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Finding the Third Proportional to 9,679 and 20,396

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Solution

The third proportional to 9,679 and 20,396 is: 42,979.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,679 : 20,396 = 20,396 : x
  2. Step 2: Convert to fraction form
    9,679/20,396 = 20,396/x
  3. Step 3: Cross multiply
    9,679x = 20,396 × 20,396
  4. Step 4: Simplify right side
    9,679x = 415,996,816
  5. Step 5: Solve for x
    x = 415,996,816/9,679
  6. Step 6: Final answer
    x = 42,979.32

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.