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Finding the Fourth Proportional to 5,286.76, 7,927.26 and 2,690.92

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Solution

The fourth proportional to 5,286.76, 7,927.26 and 2,690.92 is: 4,034.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,286.76 : 7,927.26 = 2,690.92 : x
  2. Step 2: Convert to fraction form
    5,286.76/7,927.26 = 2,690.92/x
  3. Step 3: Cross multiply
    5,286.76x = 7,927.26 × 2,690.92
  4. Step 4: Simplify right side
    5,286.76x = 21,331,622.48
  5. Step 5: Solve for x
    x = 21,331,622.48/5,286.76
  6. Step 6: Final answer
    x = 4,034.91

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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.