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Finding the Fourth Proportional to 5,145.73, 7,101.14 and 2,787.87

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Solution

The fourth proportional to 5,145.73, 7,101.14 and 2,787.87 is: 3,847.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.73 : 7,101.14 = 2,787.87 : x
  2. Step 2: Convert to fraction form
    5,145.73/7,101.14 = 2,787.87/x
  3. Step 3: Cross multiply
    5,145.73x = 7,101.14 × 2,787.87
  4. Step 4: Simplify right side
    5,145.73x = 19,797,062.14
  5. Step 5: Solve for x
    x = 19,797,062.14/5,145.73
  6. Step 6: Final answer
    x = 3,847.28

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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.