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Finding the Fourth Proportional to 9,318.87, 13,978.56 and 2,745.30

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Solution

The fourth proportional to 9,318.87, 13,978.56 and 2,745.30 is: 4,118.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,318.87 : 13,978.56 = 2,745.30 : x
  2. Step 2: Convert to fraction form
    9,318.87/13,978.56 = 2,745.30/x
  3. Step 3: Cross multiply
    9,318.87x = 13,978.56 × 2,745.30
  4. Step 4: Simplify right side
    9,318.87x = 38,375,340.77
  5. Step 5: Solve for x
    x = 38,375,340.77/9,318.87
  6. Step 6: Final answer
    x = 4,118.03

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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.