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Finding the Third Proportional to 11,321 and 18,865

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Solution

The third proportional to 11,321 and 18,865 is: 31,436.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,321 : 18,865 = 18,865 : x
  2. Step 2: Convert to fraction form
    11,321/18,865 = 18,865/x
  3. Step 3: Cross multiply
    11,321x = 18,865 × 18,865
  4. Step 4: Simplify right side
    11,321x = 355,888,225
  5. Step 5: Solve for x
    x = 355,888,225/11,321
  6. Step 6: Final answer
    x = 31,436.11

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Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.