Home / 5,215.72-7,821.66-2,137.96

Finding the Fourth Proportional to 5,215.72, 7,821.66 and 2,137.96

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Solution

The fourth proportional to 5,215.72, 7,821.66 and 2,137.96 is: 3,206.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.72 : 7,821.66 = 2,137.96 : x
  2. Step 2: Convert to fraction form
    5,215.72/7,821.66 = 2,137.96/x
  3. Step 3: Cross multiply
    5,215.72x = 7,821.66 × 2,137.96
  4. Step 4: Simplify right side
    5,215.72x = 16,722,396.21
  5. Step 5: Solve for x
    x = 16,722,396.21/5,215.72
  6. Step 6: Final answer
    x = 3,206.15

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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.