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Finding the Fourth Proportional to 7,940, 11,910.50 and 2,674.58

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Solution

The fourth proportional to 7,940, 11,910.50 and 2,674.58 is: 4,012.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,940 : 11,910.50 = 2,674.58 : x
  2. Step 2: Convert to fraction form
    7,940/11,910.50 = 2,674.58/x
  3. Step 3: Cross multiply
    7,940x = 11,910.50 × 2,674.58
  4. Step 4: Simplify right side
    7,940x = 31,855,585.09
  5. Step 5: Solve for x
    x = 31,855,585.09/7,940
  6. Step 6: Final answer
    x = 4,012.04

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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.