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Finding the Fourth Proportional to 7,874.68, 11,808.42 and 2,940.70

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Solution

The fourth proportional to 7,874.68, 11,808.42 and 2,940.70 is: 4,409.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,874.68 : 11,808.42 = 2,940.70 : x
  2. Step 2: Convert to fraction form
    7,874.68/11,808.42 = 2,940.70/x
  3. Step 3: Cross multiply
    7,874.68x = 11,808.42 × 2,940.70
  4. Step 4: Simplify right side
    7,874.68x = 34,725,020.69
  5. Step 5: Solve for x
    x = 34,725,020.69/7,874.68
  6. Step 6: Final answer
    x = 4,409.71

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1.5x scale

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.