Home / 3,121.37-4,308.66-1,942.21

Finding the Fourth Proportional to 3,121.37, 4,308.66 and 1,942.21

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Solution

The fourth proportional to 3,121.37, 4,308.66 and 1,942.21 is: 2,680.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.37 : 4,308.66 = 1,942.21 : x
  2. Step 2: Convert to fraction form
    3,121.37/4,308.66 = 1,942.21/x
  3. Step 3: Cross multiply
    3,121.37x = 4,308.66 × 1,942.21
  4. Step 4: Simplify right side
    3,121.37x = 8,368,327.92
  5. Step 5: Solve for x
    x = 8,368,327.92/3,121.37
  6. Step 6: Final answer
    x = 2,680.98

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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.