Home / 2,787.28-4,176.24-1,961.80

Finding the Fourth Proportional to 2,787.28, 4,176.24 and 1,961.80

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Solution

The fourth proportional to 2,787.28, 4,176.24 and 1,961.80 is: 2,939.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.28 : 4,176.24 = 1,961.80 : x
  2. Step 2: Convert to fraction form
    2,787.28/4,176.24 = 1,961.80/x
  3. Step 3: Cross multiply
    2,787.28x = 4,176.24 × 1,961.80
  4. Step 4: Simplify right side
    2,787.28x = 8,192,947.63
  5. Step 5: Solve for x
    x = 8,192,947.63/2,787.28
  6. Step 6: Final answer
    x = 2,939.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.