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Finding the Fourth Proportional to 7,891.48, 11,835.60 and 3,729.72

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Solution

The fourth proportional to 7,891.48, 11,835.60 and 3,729.72 is: 5,593.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.48 : 11,835.60 = 3,729.72 : x
  2. Step 2: Convert to fraction form
    7,891.48/11,835.60 = 3,729.72/x
  3. Step 3: Cross multiply
    7,891.48x = 11,835.60 × 3,729.72
  4. Step 4: Simplify right side
    7,891.48x = 44,143,474.03
  5. Step 5: Solve for x
    x = 44,143,474.03/7,891.48
  6. Step 6: Final answer
    x = 5,593.81

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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.