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Finding the Third Proportional to 12,879 and 18,771.75

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Solution

The third proportional to 12,879 and 18,771.75 is: 27,360.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879 : 18,771.75 = 18,771.75 : x
  2. Step 2: Convert to fraction form
    12,879/18,771.75 = 18,771.75/x
  3. Step 3: Cross multiply
    12,879x = 18,771.75 × 18,771.75
  4. Step 4: Simplify right side
    12,879x = 352,378,598.06
  5. Step 5: Solve for x
    x = 352,378,598.06/12,879
  6. Step 6: Final answer
    x = 27,360.71

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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.