Home / 3,107.40-4,291.20-2,115.96

Finding the Fourth Proportional to 3,107.40, 4,291.20 and 2,115.96

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Solution

The fourth proportional to 3,107.40, 4,291.20 and 2,115.96 is: 2,922.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.40 : 4,291.20 = 2,115.96 : x
  2. Step 2: Convert to fraction form
    3,107.40/4,291.20 = 2,115.96/x
  3. Step 3: Cross multiply
    3,107.40x = 4,291.20 × 2,115.96
  4. Step 4: Simplify right side
    3,107.40x = 9,080,007.55
  5. Step 5: Solve for x
    x = 9,080,007.55/3,107.40
  6. Step 6: Final answer
    x = 2,922.06

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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.