Home / 3,938.97-5,403.20-3,856.95

Finding the Fourth Proportional to 3,938.97, 5,403.20 and 3,856.95

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Solution

The fourth proportional to 3,938.97, 5,403.20 and 3,856.95 is: 5,290.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.97 : 5,403.20 = 3,856.95 : x
  2. Step 2: Convert to fraction form
    3,938.97/5,403.20 = 3,856.95/x
  3. Step 3: Cross multiply
    3,938.97x = 5,403.20 × 3,856.95
  4. Step 4: Simplify right side
    3,938.97x = 20,839,852.96
  5. Step 5: Solve for x
    x = 20,839,852.96/3,938.97
  6. Step 6: Final answer
    x = 5,290.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.