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Finding the Fourth Proportional to 7,912.87, 11,868.28 and 3,755.53

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Solution

The fourth proportional to 7,912.87, 11,868.28 and 3,755.53 is: 5,632.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,912.87 : 11,868.28 = 3,755.53 : x
  2. Step 2: Convert to fraction form
    7,912.87/11,868.28 = 3,755.53/x
  3. Step 3: Cross multiply
    7,912.87x = 11,868.28 × 3,755.53
  4. Step 4: Simplify right side
    7,912.87x = 44,571,681.59
  5. Step 5: Solve for x
    x = 44,571,681.59/7,912.87
  6. Step 6: Final answer
    x = 5,632.81

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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.