Home / 3,928.48-5,418.92-3,087.84

Finding the Fourth Proportional to 3,928.48, 5,418.92 and 3,087.84

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Solution

The fourth proportional to 3,928.48, 5,418.92 and 3,087.84 is: 4,259.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.48 : 5,418.92 = 3,087.84 : x
  2. Step 2: Convert to fraction form
    3,928.48/5,418.92 = 3,087.84/x
  3. Step 3: Cross multiply
    3,928.48x = 5,418.92 × 3,087.84
  4. Step 4: Simplify right side
    3,928.48x = 16,732,757.93
  5. Step 5: Solve for x
    x = 16,732,757.93/3,928.48
  6. Step 6: Final answer
    x = 4,259.35

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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.