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Finding the Third Proportional to 11,421 and 16,686

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Solution

The third proportional to 11,421 and 16,686 is: 24,378.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,421 : 16,686 = 16,686 : x
  2. Step 2: Convert to fraction form
    11,421/16,686 = 16,686/x
  3. Step 3: Cross multiply
    11,421x = 16,686 × 16,686
  4. Step 4: Simplify right side
    11,421x = 278,422,596
  5. Step 5: Solve for x
    x = 278,422,596/11,421
  6. Step 6: Final answer
    x = 24,378.13

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.