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Finding the Fourth Proportional to 7,438, 11,157.72 and 2,508.88

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Solution

The fourth proportional to 7,438, 11,157.72 and 2,508.88 is: 3,763.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,438 : 11,157.72 = 2,508.88 : x
  2. Step 2: Convert to fraction form
    7,438/11,157.72 = 2,508.88/x
  3. Step 3: Cross multiply
    7,438x = 11,157.72 × 2,508.88
  4. Step 4: Simplify right side
    7,438x = 27,993,380.55
  5. Step 5: Solve for x
    x = 27,993,380.55/7,438
  6. Step 6: Final answer
    x = 3,763.56

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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.