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Finding the Third Proportional to 3,900.75 and 8,905.88

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Solution

The third proportional to 3,900.75 and 8,905.88 is: 20,333.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.75 : 8,905.88 = 8,905.88 : x
  2. Step 2: Convert to fraction form
    3,900.75/8,905.88 = 8,905.88/x
  3. Step 3: Cross multiply
    3,900.75x = 8,905.88 × 8,905.88
  4. Step 4: Simplify right side
    3,900.75x = 79,314,609.52
  5. Step 5: Solve for x
    x = 79,314,609.52/3,900.75
  6. Step 6: Final answer
    x = 20,333.17

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Why These Related Problems?

These problems maintain the same ratio (2.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.