Home / 3,216.78-4,827.60-2,120.76

Finding the Fourth Proportional to 3,216.78, 4,827.60 and 2,120.76

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Solution

The fourth proportional to 3,216.78, 4,827.60 and 2,120.76 is: 3,182.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,216.78 : 4,827.60 = 2,120.76 : x
  2. Step 2: Convert to fraction form
    3,216.78/4,827.60 = 2,120.76/x
  3. Step 3: Cross multiply
    3,216.78x = 4,827.60 × 2,120.76
  4. Step 4: Simplify right side
    3,216.78x = 10,238,180.98
  5. Step 5: Solve for x
    x = 10,238,180.98/3,216.78
  6. Step 6: Final answer
    x = 3,182.74

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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.