Home / 8,120.56-12,179.52-3,186.64

Finding the Fourth Proportional to 8,120.56, 12,179.52 and 3,186.64

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Solution

The fourth proportional to 8,120.56, 12,179.52 and 3,186.64 is: 4,779.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120.56 : 12,179.52 = 3,186.64 : x
  2. Step 2: Convert to fraction form
    8,120.56/12,179.52 = 3,186.64/x
  3. Step 3: Cross multiply
    8,120.56x = 12,179.52 × 3,186.64
  4. Step 4: Simplify right side
    8,120.56x = 38,811,745.61
  5. Step 5: Solve for x
    x = 38,811,745.61/8,120.56
  6. Step 6: Final answer
    x = 4,779.44

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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.