Home / 3,920.11-5,880.50-1,286.82

Finding the Fourth Proportional to 3,920.11, 5,880.50 and 1,286.82

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Solution

The fourth proportional to 3,920.11, 5,880.50 and 1,286.82 is: 1,930.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.11 : 5,880.50 = 1,286.82 : x
  2. Step 2: Convert to fraction form
    3,920.11/5,880.50 = 1,286.82/x
  3. Step 3: Cross multiply
    3,920.11x = 5,880.50 × 1,286.82
  4. Step 4: Simplify right side
    3,920.11x = 7,567,145.01
  5. Step 5: Solve for x
    x = 7,567,145.01/3,920.11
  6. Step 6: Final answer
    x = 1,930.34

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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.