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Finding the Third Proportional to 2,991.94 and 8,079.75

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Solution

The third proportional to 2,991.94 and 8,079.75 is: 21,819.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.94 : 8,079.75 = 8,079.75 : x
  2. Step 2: Convert to fraction form
    2,991.94/8,079.75 = 8,079.75/x
  3. Step 3: Cross multiply
    2,991.94x = 8,079.75 × 8,079.75
  4. Step 4: Simplify right side
    2,991.94x = 65,282,360.06
  5. Step 5: Solve for x
    x = 65,282,360.06/2,991.94
  6. Step 6: Final answer
    x = 21,819.43

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Why These Related Problems?

These problems maintain the same ratio (2.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.