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Finding the Fourth Proportional to 5,261.91, 7,893 and 2,489.88

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Solution

The fourth proportional to 5,261.91, 7,893 and 2,489.88 is: 3,734.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,261.91 : 7,893 = 2,489.88 : x
  2. Step 2: Convert to fraction form
    5,261.91/7,893 = 2,489.88/x
  3. Step 3: Cross multiply
    5,261.91x = 7,893 × 2,489.88
  4. Step 4: Simplify right side
    5,261.91x = 19,652,622.84
  5. Step 5: Solve for x
    x = 19,652,622.84/5,261.91
  6. Step 6: Final answer
    x = 3,734.88

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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.