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Finding the Third Proportional to 8,858 and 21,155

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Solution

The third proportional to 8,858 and 21,155 is: 50,523.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,858 : 21,155 = 21,155 : x
  2. Step 2: Convert to fraction form
    8,858/21,155 = 21,155/x
  3. Step 3: Cross multiply
    8,858x = 21,155 × 21,155
  4. Step 4: Simplify right side
    8,858x = 447,534,025
  5. Step 5: Solve for x
    x = 447,534,025/8,858
  6. Step 6: Final answer
    x = 50,523.15

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Why These Related Problems?

These problems maintain the same ratio (2.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.