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Finding the Third Proportional to 5,165.85 and 7,728.75

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Solution

The third proportional to 5,165.85 and 7,728.75 is: 11,563.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,165.85 : 7,728.75 = 7,728.75 : x
  2. Step 2: Convert to fraction form
    5,165.85/7,728.75 = 7,728.75/x
  3. Step 3: Cross multiply
    5,165.85x = 7,728.75 × 7,728.75
  4. Step 4: Simplify right side
    5,165.85x = 59,733,525.62
  5. Step 5: Solve for x
    x = 59,733,525.62/5,165.85
  6. Step 6: Final answer
    x = 11,563.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.