Home / 3,947.60-5,447.44-2,179.20

Finding the Fourth Proportional to 3,947.60, 5,447.44 and 2,179.20

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Solution

The fourth proportional to 3,947.60, 5,447.44 and 2,179.20 is: 3,007.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.60 : 5,447.44 = 2,179.20 : x
  2. Step 2: Convert to fraction form
    3,947.60/5,447.44 = 2,179.20/x
  3. Step 3: Cross multiply
    3,947.60x = 5,447.44 × 2,179.20
  4. Step 4: Simplify right side
    3,947.60x = 11,871,061.25
  5. Step 5: Solve for x
    x = 11,871,061.25/3,947.60
  6. Step 6: Final answer
    x = 3,007.16

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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.