Home / 3,921.48-5,405.94-2,738.88

Finding the Fourth Proportional to 3,921.48, 5,405.94 and 2,738.88

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Solution

The fourth proportional to 3,921.48, 5,405.94 and 2,738.88 is: 3,775.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.48 : 5,405.94 = 2,738.88 : x
  2. Step 2: Convert to fraction form
    3,921.48/5,405.94 = 2,738.88/x
  3. Step 3: Cross multiply
    3,921.48x = 5,405.94 × 2,738.88
  4. Step 4: Simplify right side
    3,921.48x = 14,806,220.95
  5. Step 5: Solve for x
    x = 14,806,220.95/3,921.48
  6. Step 6: Final answer
    x = 3,775.67

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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.