Home / 3,912.78-5,401.36-2,738.46

Finding the Fourth Proportional to 3,912.78, 5,401.36 and 2,738.46

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Solution

The fourth proportional to 3,912.78, 5,401.36 and 2,738.46 is: 3,780.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.78 : 5,401.36 = 2,738.46 : x
  2. Step 2: Convert to fraction form
    3,912.78/5,401.36 = 2,738.46/x
  3. Step 3: Cross multiply
    3,912.78x = 5,401.36 × 2,738.46
  4. Step 4: Simplify right side
    3,912.78x = 14,791,408.31
  5. Step 5: Solve for x
    x = 14,791,408.31/3,912.78
  6. Step 6: Final answer
    x = 3,780.28

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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.