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Finding the Fourth Proportional to 5,818.80, 8,028.28 and 3,721.20

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Solution

The fourth proportional to 5,818.80, 8,028.28 and 3,721.20 is: 5,134.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,818.80 : 8,028.28 = 3,721.20 : x
  2. Step 2: Convert to fraction form
    5,818.80/8,028.28 = 3,721.20/x
  3. Step 3: Cross multiply
    5,818.80x = 8,028.28 × 3,721.20
  4. Step 4: Simplify right side
    5,818.80x = 29,874,835.54
  5. Step 5: Solve for x
    x = 29,874,835.54/5,818.80
  6. Step 6: Final answer
    x = 5,134.19

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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.