Home / 3,947.48-5,447.54-2,179.19

Finding the Fourth Proportional to 3,947.48, 5,447.54 and 2,179.19

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Solution

The fourth proportional to 3,947.48, 5,447.54 and 2,179.19 is: 3,007.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.48 : 5,447.54 = 2,179.19 : x
  2. Step 2: Convert to fraction form
    3,947.48/5,447.54 = 2,179.19/x
  3. Step 3: Cross multiply
    3,947.48x = 5,447.54 × 2,179.19
  4. Step 4: Simplify right side
    3,947.48x = 11,871,213.80
  5. Step 5: Solve for x
    x = 11,871,213.80/3,947.48
  6. Step 6: Final answer
    x = 3,007.29

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Double scale
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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.