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Finding the Fourth Proportional to 5,679.76, 8,520.69 and 2,559.85

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Solution

The fourth proportional to 5,679.76, 8,520.69 and 2,559.85 is: 3,840.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,679.76 : 8,520.69 = 2,559.85 : x
  2. Step 2: Convert to fraction form
    5,679.76/8,520.69 = 2,559.85/x
  3. Step 3: Cross multiply
    5,679.76x = 8,520.69 × 2,559.85
  4. Step 4: Simplify right side
    5,679.76x = 21,811,688.30
  5. Step 5: Solve for x
    x = 21,811,688.30/5,679.76
  6. Step 6: Final answer
    x = 3,840.25

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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.