Home / 3,947.55-5,447.69-2,179.12

Finding the Fourth Proportional to 3,947.55, 5,447.69 and 2,179.12

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Solution

The fourth proportional to 3,947.55, 5,447.69 and 2,179.12 is: 3,007.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.55 : 5,447.69 = 2,179.12 : x
  2. Step 2: Convert to fraction form
    3,947.55/5,447.69 = 2,179.12/x
  3. Step 3: Cross multiply
    3,947.55x = 5,447.69 × 2,179.12
  4. Step 4: Simplify right side
    3,947.55x = 11,871,142.99
  5. Step 5: Solve for x
    x = 11,871,142.99/3,947.55
  6. Step 6: Final answer
    x = 3,007.22

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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.