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Finding the Fourth Proportional to 8,589.05, 12,878.31 and 3,655.88

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Solution

The fourth proportional to 8,589.05, 12,878.31 and 3,655.88 is: 5,481.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,589.05 : 12,878.31 = 3,655.88 : x
  2. Step 2: Convert to fraction form
    8,589.05/12,878.31 = 3,655.88/x
  3. Step 3: Cross multiply
    8,589.05x = 12,878.31 × 3,655.88
  4. Step 4: Simplify right side
    8,589.05x = 47,081,555.96
  5. Step 5: Solve for x
    x = 47,081,555.96/8,589.05
  6. Step 6: Final answer
    x = 5,481.58

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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.