Home / 3,107.30-4,286.26-1,987.83

Finding the Fourth Proportional to 3,107.30, 4,286.26 and 1,987.83

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Solution

The fourth proportional to 3,107.30, 4,286.26 and 1,987.83 is: 2,742.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.30 : 4,286.26 = 1,987.83 : x
  2. Step 2: Convert to fraction form
    3,107.30/4,286.26 = 1,987.83/x
  3. Step 3: Cross multiply
    3,107.30x = 4,286.26 × 1,987.83
  4. Step 4: Simplify right side
    3,107.30x = 8,520,324.85
  5. Step 5: Solve for x
    x = 8,520,324.85/3,107.30
  6. Step 6: Final answer
    x = 2,742.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.