Home / 7,858.78-11,785.20-3,960.52

Finding the Fourth Proportional to 7,858.78, 11,785.20 and 3,960.52

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Solution

The fourth proportional to 7,858.78, 11,785.20 and 3,960.52 is: 5,939.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,858.78 : 11,785.20 = 3,960.52 : x
  2. Step 2: Convert to fraction form
    7,858.78/11,785.20 = 3,960.52/x
  3. Step 3: Cross multiply
    7,858.78x = 11,785.20 × 3,960.52
  4. Step 4: Simplify right side
    7,858.78x = 46,675,520.30
  5. Step 5: Solve for x
    x = 46,675,520.30/7,858.78
  6. Step 6: Final answer
    x = 5,939.28

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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.