Home / 3,905.72-5,389.94-2,137.29

Finding the Fourth Proportional to 3,905.72, 5,389.94 and 2,137.29

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Solution

The fourth proportional to 3,905.72, 5,389.94 and 2,137.29 is: 2,949.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.72 : 5,389.94 = 2,137.29 : x
  2. Step 2: Convert to fraction form
    3,905.72/5,389.94 = 2,137.29/x
  3. Step 3: Cross multiply
    3,905.72x = 5,389.94 × 2,137.29
  4. Step 4: Simplify right side
    3,905.72x = 11,519,849.99
  5. Step 5: Solve for x
    x = 11,519,849.99/3,905.72
  6. Step 6: Final answer
    x = 2,949.48

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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.