Home / 3,619.80-5,429.70-2,083.80

Finding the Fourth Proportional to 3,619.80, 5,429.70 and 2,083.80

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Solution

The fourth proportional to 3,619.80, 5,429.70 and 2,083.80 is: 3,125.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.80 : 5,429.70 = 2,083.80 : x
  2. Step 2: Convert to fraction form
    3,619.80/5,429.70 = 2,083.80/x
  3. Step 3: Cross multiply
    3,619.80x = 5,429.70 × 2,083.80
  4. Step 4: Simplify right side
    3,619.80x = 11,314,408.86
  5. Step 5: Solve for x
    x = 11,314,408.86/3,619.80
  6. Step 6: Final answer
    x = 3,125.70

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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.