Home / 3,905.91-5,390.16-2,137.52

Finding the Fourth Proportional to 3,905.91, 5,390.16 and 2,137.52

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Solution

The fourth proportional to 3,905.91, 5,390.16 and 2,137.52 is: 2,949.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.91 : 5,390.16 = 2,137.52 : x
  2. Step 2: Convert to fraction form
    3,905.91/5,390.16 = 2,137.52/x
  3. Step 3: Cross multiply
    3,905.91x = 5,390.16 × 2,137.52
  4. Step 4: Simplify right side
    3,905.91x = 11,521,574.80
  5. Step 5: Solve for x
    x = 11,521,574.80/3,905.91
  6. Step 6: Final answer
    x = 2,949.78

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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.