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Finding the Fourth Proportional to 7,940.79, 11,908.64 and 2,674.37

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Solution

The fourth proportional to 7,940.79, 11,908.64 and 2,674.37 is: 4,010.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,940.79 : 11,908.64 = 2,674.37 : x
  2. Step 2: Convert to fraction form
    7,940.79/11,908.64 = 2,674.37/x
  3. Step 3: Cross multiply
    7,940.79x = 11,908.64 × 2,674.37
  4. Step 4: Simplify right side
    7,940.79x = 31,848,146.01
  5. Step 5: Solve for x
    x = 31,848,146.01/7,940.79
  6. Step 6: Final answer
    x = 4,010.70

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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.