Home / 3,815.60-5,721.37-1,965.96

Finding the Fourth Proportional to 3,815.60, 5,721.37 and 1,965.96

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Solution

The fourth proportional to 3,815.60, 5,721.37 and 1,965.96 is: 2,947.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,815.60 : 5,721.37 = 1,965.96 : x
  2. Step 2: Convert to fraction form
    3,815.60/5,721.37 = 1,965.96/x
  3. Step 3: Cross multiply
    3,815.60x = 5,721.37 × 1,965.96
  4. Step 4: Simplify right side
    3,815.60x = 11,247,979.65
  5. Step 5: Solve for x
    x = 11,247,979.65/3,815.60
  6. Step 6: Final answer
    x = 2,947.90

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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.