Home / 3,121.43-4,304.07-2,127.29

Finding the Fourth Proportional to 3,121.43, 4,304.07 and 2,127.29

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Solution

The fourth proportional to 3,121.43, 4,304.07 and 2,127.29 is: 2,933.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.43 : 4,304.07 = 2,127.29 : x
  2. Step 2: Convert to fraction form
    3,121.43/4,304.07 = 2,127.29/x
  3. Step 3: Cross multiply
    3,121.43x = 4,304.07 × 2,127.29
  4. Step 4: Simplify right side
    3,121.43x = 9,155,983.55
  5. Step 5: Solve for x
    x = 9,155,983.55/3,121.43
  6. Step 6: Final answer
    x = 2,933.27

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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.