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Finding the Third Proportional to 8,216 and 11,478

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Solution

The third proportional to 8,216 and 11,478 is: 16,035.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,216 : 11,478 = 11,478 : x
  2. Step 2: Convert to fraction form
    8,216/11,478 = 11,478/x
  3. Step 3: Cross multiply
    8,216x = 11,478 × 11,478
  4. Step 4: Simplify right side
    8,216x = 131,744,484
  5. Step 5: Solve for x
    x = 131,744,484/8,216
  6. Step 6: Final answer
    x = 16,035.11

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.