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Finding the Fourth Proportional to 3,856.74, 5,787.14 and 2,103

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Solution

The fourth proportional to 3,856.74, 5,787.14 and 2,103 is: 3,155.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.74 : 5,787.14 = 2,103 : x
  2. Step 2: Convert to fraction form
    3,856.74/5,787.14 = 2,103/x
  3. Step 3: Cross multiply
    3,856.74x = 5,787.14 × 2,103
  4. Step 4: Simplify right side
    3,856.74x = 12,170,344.91
  5. Step 5: Solve for x
    x = 12,170,344.91/3,856.74
  6. Step 6: Final answer
    x = 3,155.60

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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.