Home / 3,712.80-5,121.72-3,012.96

Finding the Fourth Proportional to 3,712.80, 5,121.72 and 3,012.96

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Solution

The fourth proportional to 3,712.80, 5,121.72 and 3,012.96 is: 4,156.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,712.80 : 5,121.72 = 3,012.96 : x
  2. Step 2: Convert to fraction form
    3,712.80/5,121.72 = 3,012.96/x
  3. Step 3: Cross multiply
    3,712.80x = 5,121.72 × 3,012.96
  4. Step 4: Simplify right side
    3,712.80x = 15,431,537.49
  5. Step 5: Solve for x
    x = 15,431,537.49/3,712.80
  6. Step 6: Final answer
    x = 4,156.31

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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.