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Finding the Third Proportional to 5,418 and 8,712

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Solution

The third proportional to 5,418 and 8,712 is: 14,008.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418 : 8,712 = 8,712 : x
  2. Step 2: Convert to fraction form
    5,418/8,712 = 8,712/x
  3. Step 3: Cross multiply
    5,418x = 8,712 × 8,712
  4. Step 4: Simplify right side
    5,418x = 75,898,944
  5. Step 5: Solve for x
    x = 75,898,944/5,418
  6. Step 6: Final answer
    x = 14,008.66

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.