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Finding the Third Proportional to 10,611 and 11,421

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Solution

The third proportional to 10,611 and 11,421 is: 12,292.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,611 : 11,421 = 11,421 : x
  2. Step 2: Convert to fraction form
    10,611/11,421 = 11,421/x
  3. Step 3: Cross multiply
    10,611x = 11,421 × 11,421
  4. Step 4: Simplify right side
    10,611x = 130,439,241
  5. Step 5: Solve for x
    x = 130,439,241/10,611
  6. Step 6: Final answer
    x = 12,292.83

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.