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Finding the Fourth Proportional to 5,375.78, 7,418 and 3,018.18

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Solution

The fourth proportional to 5,375.78, 7,418 and 3,018.18 is: 4,164.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,375.78 : 7,418 = 3,018.18 : x
  2. Step 2: Convert to fraction form
    5,375.78/7,418 = 3,018.18/x
  3. Step 3: Cross multiply
    5,375.78x = 7,418 × 3,018.18
  4. Step 4: Simplify right side
    5,375.78x = 22,388,859.24
  5. Step 5: Solve for x
    x = 22,388,859.24/5,375.78
  6. Step 6: Final answer
    x = 4,164.76

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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.