Home / 5,520.78-8,279.10-1,821.90

Finding the Fourth Proportional to 5,520.78, 8,279.10 and 1,821.90

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Solution

The fourth proportional to 5,520.78, 8,279.10 and 1,821.90 is: 2,732.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,520.78 : 8,279.10 = 1,821.90 : x
  2. Step 2: Convert to fraction form
    5,520.78/8,279.10 = 1,821.90/x
  3. Step 3: Cross multiply
    5,520.78x = 8,279.10 × 1,821.90
  4. Step 4: Simplify right side
    5,520.78x = 15,083,692.29
  5. Step 5: Solve for x
    x = 15,083,692.29/5,520.78
  6. Step 6: Final answer
    x = 2,732.17

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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.