Home / 4,787.40-7,179.84-2,189.76

Finding the Fourth Proportional to 4,787.40, 7,179.84 and 2,189.76

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Solution

The fourth proportional to 4,787.40, 7,179.84 and 2,189.76 is: 3,284.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,787.40 : 7,179.84 = 2,189.76 : x
  2. Step 2: Convert to fraction form
    4,787.40/7,179.84 = 2,189.76/x
  3. Step 3: Cross multiply
    4,787.40x = 7,179.84 × 2,189.76
  4. Step 4: Simplify right side
    4,787.40x = 15,722,126.44
  5. Step 5: Solve for x
    x = 15,722,126.44/4,787.40
  6. Step 6: Final answer
    x = 3,284.06

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1.5x scale

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.