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Finding the Fourth Proportional to 5,689.78, 8,539.96 and 2,918.44

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Solution

The fourth proportional to 5,689.78, 8,539.96 and 2,918.44 is: 4,380.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,689.78 : 8,539.96 = 2,918.44 : x
  2. Step 2: Convert to fraction form
    5,689.78/8,539.96 = 2,918.44/x
  3. Step 3: Cross multiply
    5,689.78x = 8,539.96 × 2,918.44
  4. Step 4: Simplify right side
    5,689.78x = 24,923,360.86
  5. Step 5: Solve for x
    x = 24,923,360.86/5,689.78
  6. Step 6: Final answer
    x = 4,380.37

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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.