Home / 3,122.38-4,309.74-1,942.75

Finding the Fourth Proportional to 3,122.38, 4,309.74 and 1,942.75

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Solution

The fourth proportional to 3,122.38, 4,309.74 and 1,942.75 is: 2,681.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.38 : 4,309.74 = 1,942.75 : x
  2. Step 2: Convert to fraction form
    3,122.38/4,309.74 = 1,942.75/x
  3. Step 3: Cross multiply
    3,122.38x = 4,309.74 × 1,942.75
  4. Step 4: Simplify right side
    3,122.38x = 8,372,747.39
  5. Step 5: Solve for x
    x = 8,372,747.39/3,122.38
  6. Step 6: Final answer
    x = 2,681.53

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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.