Home / 3,138.51-4,334.07-2,021.39

Finding the Fourth Proportional to 3,138.51, 4,334.07 and 2,021.39

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Solution

The fourth proportional to 3,138.51, 4,334.07 and 2,021.39 is: 2,791.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.51 : 4,334.07 = 2,021.39 : x
  2. Step 2: Convert to fraction form
    3,138.51/4,334.07 = 2,021.39/x
  3. Step 3: Cross multiply
    3,138.51x = 4,334.07 × 2,021.39
  4. Step 4: Simplify right side
    3,138.51x = 8,760,872.30
  5. Step 5: Solve for x
    x = 8,760,872.30/3,138.51
  6. Step 6: Final answer
    x = 2,791.41

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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.