Home / 2,821.32-4,234.68-2,157

Finding the Fourth Proportional to 2,821.32, 4,234.68 and 2,157

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Solution

The fourth proportional to 2,821.32, 4,234.68 and 2,157 is: 3,237.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.32 : 4,234.68 = 2,157 : x
  2. Step 2: Convert to fraction form
    2,821.32/4,234.68 = 2,157/x
  3. Step 3: Cross multiply
    2,821.32x = 4,234.68 × 2,157
  4. Step 4: Simplify right side
    2,821.32x = 9,134,204.76
  5. Step 5: Solve for x
    x = 9,134,204.76/2,821.32
  6. Step 6: Final answer
    x = 3,237.56

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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.