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Finding the Third Proportional to 11,879 and 18,465

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Solution

The third proportional to 11,879 and 18,465 is: 28,702.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,879 : 18,465 = 18,465 : x
  2. Step 2: Convert to fraction form
    11,879/18,465 = 18,465/x
  3. Step 3: Cross multiply
    11,879x = 18,465 × 18,465
  4. Step 4: Simplify right side
    11,879x = 340,956,225
  5. Step 5: Solve for x
    x = 340,956,225/11,879
  6. Step 6: Final answer
    x = 28,702.43

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.