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Finding the Fourth Proportional to 8,296.78, 12,438.99 and 3,615.90

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Solution

The fourth proportional to 8,296.78, 12,438.99 and 3,615.90 is: 5,421.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,296.78 : 12,438.99 = 3,615.90 : x
  2. Step 2: Convert to fraction form
    8,296.78/12,438.99 = 3,615.90/x
  3. Step 3: Cross multiply
    8,296.78x = 12,438.99 × 3,615.90
  4. Step 4: Simplify right side
    8,296.78x = 44,978,143.94
  5. Step 5: Solve for x
    x = 44,978,143.94/8,296.78
  6. Step 6: Final answer
    x = 5,421.16

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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.