Home / 3,121.16-4,283.43-2,825.78

Finding the Fourth Proportional to 3,121.16, 4,283.43 and 2,825.78

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Solution

The fourth proportional to 3,121.16, 4,283.43 and 2,825.78 is: 3,878.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.16 : 4,283.43 = 2,825.78 : x
  2. Step 2: Convert to fraction form
    3,121.16/4,283.43 = 2,825.78/x
  3. Step 3: Cross multiply
    3,121.16x = 4,283.43 × 2,825.78
  4. Step 4: Simplify right side
    3,121.16x = 12,104,016.70
  5. Step 5: Solve for x
    x = 12,104,016.70/3,121.16
  6. Step 6: Final answer
    x = 3,878.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.