Home / 3,121.40-4,301.60-2,235.66

Finding the Fourth Proportional to 3,121.40, 4,301.60 and 2,235.66

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Solution

The fourth proportional to 3,121.40, 4,301.60 and 2,235.66 is: 3,080.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.40 : 4,301.60 = 2,235.66 : x
  2. Step 2: Convert to fraction form
    3,121.40/4,301.60 = 2,235.66/x
  3. Step 3: Cross multiply
    3,121.40x = 4,301.60 × 2,235.66
  4. Step 4: Simplify right side
    3,121.40x = 9,616,920.65
  5. Step 5: Solve for x
    x = 9,616,920.65/3,121.40
  6. Step 6: Final answer
    x = 3,080.97

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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.