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Finding the Fourth Proportional to 7,115.09, 10,679.09 and 3,607.54

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Solution

The fourth proportional to 7,115.09, 10,679.09 and 3,607.54 is: 5,414.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.09 : 10,679.09 = 3,607.54 : x
  2. Step 2: Convert to fraction form
    7,115.09/10,679.09 = 3,607.54/x
  3. Step 3: Cross multiply
    7,115.09x = 10,679.09 × 3,607.54
  4. Step 4: Simplify right side
    7,115.09x = 38,525,219.90
  5. Step 5: Solve for x
    x = 38,525,219.90/7,115.09
  6. Step 6: Final answer
    x = 5,414.58

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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.