Home / 3,212.60-4,813.72-1,821.80

Finding the Fourth Proportional to 3,212.60, 4,813.72 and 1,821.80

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Solution

The fourth proportional to 3,212.60, 4,813.72 and 1,821.80 is: 2,729.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,212.60 : 4,813.72 = 1,821.80 : x
  2. Step 2: Convert to fraction form
    3,212.60/4,813.72 = 1,821.80/x
  3. Step 3: Cross multiply
    3,212.60x = 4,813.72 × 1,821.80
  4. Step 4: Simplify right side
    3,212.60x = 8,769,635.10
  5. Step 5: Solve for x
    x = 8,769,635.10/3,212.60
  6. Step 6: Final answer
    x = 2,729.76

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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.