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Finding the Fourth Proportional to 13,651.56, 20,451.07 and 8,371.16

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Solution

The fourth proportional to 13,651.56, 20,451.07 and 8,371.16 is: 12,540.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,651.56 : 20,451.07 = 8,371.16 : x
  2. Step 2: Convert to fraction form
    13,651.56/20,451.07 = 8,371.16/x
  3. Step 3: Cross multiply
    13,651.56x = 20,451.07 × 8,371.16
  4. Step 4: Simplify right side
    13,651.56x = 171,199,076.89
  5. Step 5: Solve for x
    x = 171,199,076.89/13,651.56
  6. Step 6: Final answer
    x = 12,540.63

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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.