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Finding the Fourth Proportional to 5,145.87, 7,101.30 and 2,787.99

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Solution

The fourth proportional to 5,145.87, 7,101.30 and 2,787.99 is: 3,847.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.87 : 7,101.30 = 2,787.99 : x
  2. Step 2: Convert to fraction form
    5,145.87/7,101.30 = 2,787.99/x
  3. Step 3: Cross multiply
    5,145.87x = 7,101.30 × 2,787.99
  4. Step 4: Simplify right side
    5,145.87x = 19,798,353.39
  5. Step 5: Solve for x
    x = 19,798,353.39/5,145.87
  6. Step 6: Final answer
    x = 3,847.43

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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.