Home / 5,279.57-7,912.49-2,155.91

Finding the Fourth Proportional to 5,279.57, 7,912.49 and 2,155.91

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Solution

The fourth proportional to 5,279.57, 7,912.49 and 2,155.91 is: 3,231.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,279.57 : 7,912.49 = 2,155.91 : x
  2. Step 2: Convert to fraction form
    5,279.57/7,912.49 = 2,155.91/x
  3. Step 3: Cross multiply
    5,279.57x = 7,912.49 × 2,155.91
  4. Step 4: Simplify right side
    5,279.57x = 17,058,616.32
  5. Step 5: Solve for x
    x = 17,058,616.32/5,279.57
  6. Step 6: Final answer
    x = 3,231.06

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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.