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Finding the Third Proportional to 4,910 and 8,427

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Solution

The third proportional to 4,910 and 8,427 is: 14,463.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,910 : 8,427 = 8,427 : x
  2. Step 2: Convert to fraction form
    4,910/8,427 = 8,427/x
  3. Step 3: Cross multiply
    4,910x = 8,427 × 8,427
  4. Step 4: Simplify right side
    4,910x = 71,014,329
  5. Step 5: Solve for x
    x = 71,014,329/4,910
  6. Step 6: Final answer
    x = 14,463.20

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Why These Related Problems?

These problems maintain the same ratio (1.72) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.