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Finding the Fourth Proportional to 5,379.20, 8,071.86 and 2,091.86

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Solution

The fourth proportional to 5,379.20, 8,071.86 and 2,091.86 is: 3,138.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,379.20 : 8,071.86 = 2,091.86 : x
  2. Step 2: Convert to fraction form
    5,379.20/8,071.86 = 2,091.86/x
  3. Step 3: Cross multiply
    5,379.20x = 8,071.86 × 2,091.86
  4. Step 4: Simplify right side
    5,379.20x = 16,885,201.06
  5. Step 5: Solve for x
    x = 16,885,201.06/5,379.20
  6. Step 6: Final answer
    x = 3,138.98

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.