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Finding the Fourth Proportional to 3,895.12, 5,375.36 and 2,126.74

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Solution

The fourth proportional to 3,895.12, 5,375.36 and 2,126.74 is: 2,934.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,895.12 : 5,375.36 = 2,126.74 : x
  2. Step 2: Convert to fraction form
    3,895.12/5,375.36 = 2,126.74/x
  3. Step 3: Cross multiply
    3,895.12x = 5,375.36 × 2,126.74
  4. Step 4: Simplify right side
    3,895.12x = 11,431,973.04
  5. Step 5: Solve for x
    x = 11,431,973.04/3,895.12
  6. Step 6: Final answer
    x = 2,934.95

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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.