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Finding the Fourth Proportional to 7,173.75, 10,764.74 and 2,790.65

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Solution

The fourth proportional to 7,173.75, 10,764.74 and 2,790.65 is: 4,187.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,173.75 : 10,764.74 = 2,790.65 : x
  2. Step 2: Convert to fraction form
    7,173.75/10,764.74 = 2,790.65/x
  3. Step 3: Cross multiply
    7,173.75x = 10,764.74 × 2,790.65
  4. Step 4: Simplify right side
    7,173.75x = 30,040,553.90
  5. Step 5: Solve for x
    x = 30,040,553.90/7,173.75
  6. Step 6: Final answer
    x = 4,187.57

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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.