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Finding the Third Proportional to 8,724 and 18,868

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Solution

The third proportional to 8,724 and 18,868 is: 40,807.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,724 : 18,868 = 18,868 : x
  2. Step 2: Convert to fraction form
    8,724/18,868 = 18,868/x
  3. Step 3: Cross multiply
    8,724x = 18,868 × 18,868
  4. Step 4: Simplify right side
    8,724x = 356,001,424
  5. Step 5: Solve for x
    x = 356,001,424/8,724
  6. Step 6: Final answer
    x = 40,807.13

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.