Home / 3,905.99-5,390.28-2,137.61

Finding the Fourth Proportional to 3,905.99, 5,390.28 and 2,137.61

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Solution

The fourth proportional to 3,905.99, 5,390.28 and 2,137.61 is: 2,949.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.99 : 5,390.28 = 2,137.61 : x
  2. Step 2: Convert to fraction form
    3,905.99/5,390.28 = 2,137.61/x
  3. Step 3: Cross multiply
    3,905.99x = 5,390.28 × 2,137.61
  4. Step 4: Simplify right side
    3,905.99x = 11,522,316.43
  5. Step 5: Solve for x
    x = 11,522,316.43/3,905.99
  6. Step 6: Final answer
    x = 2,949.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.