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Finding the Third Proportional to 8,940 and 18,858

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Solution

The third proportional to 8,940 and 18,858 is: 39,778.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,940 : 18,858 = 18,858 : x
  2. Step 2: Convert to fraction form
    8,940/18,858 = 18,858/x
  3. Step 3: Cross multiply
    8,940x = 18,858 × 18,858
  4. Step 4: Simplify right side
    8,940x = 355,624,164
  5. Step 5: Solve for x
    x = 355,624,164/8,940
  6. Step 6: Final answer
    x = 39,778.99

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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.