Home / 3,947.50-5,447.32-2,179.00

Finding the Fourth Proportional to 3,947.50, 5,447.32 and 2,179.00

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Solution

The fourth proportional to 3,947.50, 5,447.32 and 2,179.00 is: 3,006.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.50 : 5,447.32 = 2,179.00 : x
  2. Step 2: Convert to fraction form
    3,947.50/5,447.32 = 2,179.00/x
  3. Step 3: Cross multiply
    3,947.50x = 5,447.32 × 2,179.00
  4. Step 4: Simplify right side
    3,947.50x = 11,869,711.64
  5. Step 5: Solve for x
    x = 11,869,711.64/3,947.50
  6. Step 6: Final answer
    x = 3,006.89

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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.