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Finding the Third Proportional to 4,242.50 and 9,321.75

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Solution

The third proportional to 4,242.50 and 9,321.75 is: 20,482.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,242.50 : 9,321.75 = 9,321.75 : x
  2. Step 2: Convert to fraction form
    4,242.50/9,321.75 = 9,321.75/x
  3. Step 3: Cross multiply
    4,242.50x = 9,321.75 × 9,321.75
  4. Step 4: Simplify right side
    4,242.50x = 86,895,023.06
  5. Step 5: Solve for x
    x = 86,895,023.06/4,242.50
  6. Step 6: Final answer
    x = 20,482.03

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.