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Finding the Third Proportional to 3,158 and 8,309

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Solution

The third proportional to 3,158 and 8,309 is: 21,861.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,158 : 8,309 = 8,309 : x
  2. Step 2: Convert to fraction form
    3,158/8,309 = 8,309/x
  3. Step 3: Cross multiply
    3,158x = 8,309 × 8,309
  4. Step 4: Simplify right side
    3,158x = 69,039,481
  5. Step 5: Solve for x
    x = 69,039,481/3,158
  6. Step 6: Final answer
    x = 21,861.77

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Why These Related Problems?

These problems maintain the same ratio (2.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.