Home / 5,385.84-8,082.40-2,790.60

Finding the Fourth Proportional to 5,385.84, 8,082.40 and 2,790.60

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Solution

The fourth proportional to 5,385.84, 8,082.40 and 2,790.60 is: 4,187.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,385.84 : 8,082.40 = 2,790.60 : x
  2. Step 2: Convert to fraction form
    5,385.84/8,082.40 = 2,790.60/x
  3. Step 3: Cross multiply
    5,385.84x = 8,082.40 × 2,790.60
  4. Step 4: Simplify right side
    5,385.84x = 22,554,745.44
  5. Step 5: Solve for x
    x = 22,554,745.44/5,385.84
  6. Step 6: Final answer
    x = 4,187.79

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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.