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Finding the Fourth Proportional to 8,920.88, 13,381.31 and 2,764.88

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Solution

The fourth proportional to 8,920.88, 13,381.31 and 2,764.88 is: 4,147.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.88 : 13,381.31 = 2,764.88 : x
  2. Step 2: Convert to fraction form
    8,920.88/13,381.31 = 2,764.88/x
  3. Step 3: Cross multiply
    8,920.88x = 13,381.31 × 2,764.88
  4. Step 4: Simplify right side
    8,920.88x = 36,997,656.40
  5. Step 5: Solve for x
    x = 36,997,656.40/8,920.88
  6. Step 6: Final answer
    x = 4,147.31

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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.