Home / 3,817.31-5,267.79-2,138.78

Finding the Fourth Proportional to 3,817.31, 5,267.79 and 2,138.78

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Solution

The fourth proportional to 3,817.31, 5,267.79 and 2,138.78 is: 2,951.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,817.31 : 5,267.79 = 2,138.78 : x
  2. Step 2: Convert to fraction form
    3,817.31/5,267.79 = 2,138.78/x
  3. Step 3: Cross multiply
    3,817.31x = 5,267.79 × 2,138.78
  4. Step 4: Simplify right side
    3,817.31x = 11,266,657.07
  5. Step 5: Solve for x
    x = 11,266,657.07/3,817.31
  6. Step 6: Final answer
    x = 2,951.47

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1.5x scale

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.