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Finding the Third Proportional to 9,760.50 and 21,000.75

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Solution

The third proportional to 9,760.50 and 21,000.75 is: 45,185.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,760.50 : 21,000.75 = 21,000.75 : x
  2. Step 2: Convert to fraction form
    9,760.50/21,000.75 = 21,000.75/x
  3. Step 3: Cross multiply
    9,760.50x = 21,000.75 × 21,000.75
  4. Step 4: Simplify right side
    9,760.50x = 441,031,500.56
  5. Step 5: Solve for x
    x = 441,031,500.56/9,760.50
  6. Step 6: Final answer
    x = 45,185.34

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.