Home / 3,986.72-5,974.88-2,485.12

Finding the Fourth Proportional to 3,986.72, 5,974.88 and 2,485.12

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Solution

The fourth proportional to 3,986.72, 5,974.88 and 2,485.12 is: 3,724.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.72 : 5,974.88 = 2,485.12 : x
  2. Step 2: Convert to fraction form
    3,986.72/5,974.88 = 2,485.12/x
  3. Step 3: Cross multiply
    3,986.72x = 5,974.88 × 2,485.12
  4. Step 4: Simplify right side
    3,986.72x = 14,848,251.49
  5. Step 5: Solve for x
    x = 14,848,251.49/3,986.72
  6. Step 6: Final answer
    x = 3,724.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.