Home / 5,145.56-7,100.92-2,787.70

Finding the Fourth Proportional to 5,145.56, 7,100.92 and 2,787.70

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Solution

The fourth proportional to 5,145.56, 7,100.92 and 2,787.70 is: 3,847.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.56 : 7,100.92 = 2,787.70 : x
  2. Step 2: Convert to fraction form
    5,145.56/7,100.92 = 2,787.70/x
  3. Step 3: Cross multiply
    5,145.56x = 7,100.92 × 2,787.70
  4. Step 4: Simplify right side
    5,145.56x = 19,795,234.68
  5. Step 5: Solve for x
    x = 19,795,234.68/5,145.56
  6. Step 6: Final answer
    x = 3,847.05

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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.