Home / 3,947.85-5,447.53-2,179.34

Finding the Fourth Proportional to 3,947.85, 5,447.53 and 2,179.34

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Solution

The fourth proportional to 3,947.85, 5,447.53 and 2,179.34 is: 3,007.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.85 : 5,447.53 = 2,179.34 : x
  2. Step 2: Convert to fraction form
    3,947.85/5,447.53 = 2,179.34/x
  3. Step 3: Cross multiply
    3,947.85x = 5,447.53 × 2,179.34
  4. Step 4: Simplify right side
    3,947.85x = 11,871,987.34
  5. Step 5: Solve for x
    x = 11,871,987.34/3,947.85
  6. Step 6: Final answer
    x = 3,007.20

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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.