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Finding the Third Proportional to 6,221.81 and 11,512.13

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Solution

The third proportional to 6,221.81 and 11,512.13 is: 21,300.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,221.81 : 11,512.13 = 11,512.13 : x
  2. Step 2: Convert to fraction form
    6,221.81/11,512.13 = 11,512.13/x
  3. Step 3: Cross multiply
    6,221.81x = 11,512.13 × 11,512.13
  4. Step 4: Simplify right side
    6,221.81x = 132,529,022.02
  5. Step 5: Solve for x
    x = 132,529,022.02/6,221.81
  6. Step 6: Final answer
    x = 21,300.71

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Why These Related Problems?

These problems maintain the same ratio (1.85) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.