Home / 2,125.53-3,179.97-1,428.86

Finding the Fourth Proportional to 2,125.53, 3,179.97 and 1,428.86

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Solution

The fourth proportional to 2,125.53, 3,179.97 and 1,428.86 is: 2,137.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.53 : 3,179.97 = 1,428.86 : x
  2. Step 2: Convert to fraction form
    2,125.53/3,179.97 = 1,428.86/x
  3. Step 3: Cross multiply
    2,125.53x = 3,179.97 × 1,428.86
  4. Step 4: Simplify right side
    2,125.53x = 4,543,716.03
  5. Step 5: Solve for x
    x = 4,543,716.03/2,125.53
  6. Step 6: Final answer
    x = 2,137.69

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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.