Home / 3,936.95-5,433.59-2,991.20

Finding the Fourth Proportional to 3,936.95, 5,433.59 and 2,991.20

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Solution

The fourth proportional to 3,936.95, 5,433.59 and 2,991.20 is: 4,128.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.95 : 5,433.59 = 2,991.20 : x
  2. Step 2: Convert to fraction form
    3,936.95/5,433.59 = 2,991.20/x
  3. Step 3: Cross multiply
    3,936.95x = 5,433.59 × 2,991.20
  4. Step 4: Simplify right side
    3,936.95x = 16,252,912.28
  5. Step 5: Solve for x
    x = 16,252,912.28/3,936.95
  6. Step 6: Final answer
    x = 4,128.31

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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.