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Finding the Fourth Proportional to 8,540.80, 12,790.80 and 4,144.12

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Solution

The fourth proportional to 8,540.80, 12,790.80 and 4,144.12 is: 6,206.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,540.80 : 12,790.80 = 4,144.12 : x
  2. Step 2: Convert to fraction form
    8,540.80/12,790.80 = 4,144.12/x
  3. Step 3: Cross multiply
    8,540.80x = 12,790.80 × 4,144.12
  4. Step 4: Simplify right side
    8,540.80x = 53,006,610.10
  5. Step 5: Solve for x
    x = 53,006,610.10/8,540.80
  6. Step 6: Final answer
    x = 6,206.28

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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.