Home / 5,145.56-7,100.84-2,787.68

Finding the Fourth Proportional to 5,145.56, 7,100.84 and 2,787.68

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Solution

The fourth proportional to 5,145.56, 7,100.84 and 2,787.68 is: 3,846.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.56 : 7,100.84 = 2,787.68 : x
  2. Step 2: Convert to fraction form
    5,145.56/7,100.84 = 2,787.68/x
  3. Step 3: Cross multiply
    5,145.56x = 7,100.84 × 2,787.68
  4. Step 4: Simplify right side
    5,145.56x = 19,794,869.65
  5. Step 5: Solve for x
    x = 19,794,869.65/5,145.56
  6. Step 6: Final answer
    x = 3,846.98

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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.