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Finding the Fourth Proportional to 8,672.22, 13,021.30 and 8,369.82

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Solution

The fourth proportional to 8,672.22, 13,021.30 and 8,369.82 is: 12,567.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,672.22 : 13,021.30 = 8,369.82 : x
  2. Step 2: Convert to fraction form
    8,672.22/13,021.30 = 8,369.82/x
  3. Step 3: Cross multiply
    8,672.22x = 13,021.30 × 8,369.82
  4. Step 4: Simplify right side
    8,672.22x = 108,985,937.17
  5. Step 5: Solve for x
    x = 108,985,937.17/8,672.22
  6. Step 6: Final answer
    x = 12,567.25

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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.