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Finding the Third Proportional to 4,220 and 8,951

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Solution

The third proportional to 4,220 and 8,951 is: 18,985.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,220 : 8,951 = 8,951 : x
  2. Step 2: Convert to fraction form
    4,220/8,951 = 8,951/x
  3. Step 3: Cross multiply
    4,220x = 8,951 × 8,951
  4. Step 4: Simplify right side
    4,220x = 80,120,401
  5. Step 5: Solve for x
    x = 80,120,401/4,220
  6. Step 6: Final answer
    x = 18,985.88

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.