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Finding the Fourth Proportional to 8,639.65, 12,961.14 and 3,374.44

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Solution

The fourth proportional to 8,639.65, 12,961.14 and 3,374.44 is: 5,062.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.65 : 12,961.14 = 3,374.44 : x
  2. Step 2: Convert to fraction form
    8,639.65/12,961.14 = 3,374.44/x
  3. Step 3: Cross multiply
    8,639.65x = 12,961.14 × 3,374.44
  4. Step 4: Simplify right side
    8,639.65x = 43,736,589.26
  5. Step 5: Solve for x
    x = 43,736,589.26/8,639.65
  6. Step 6: Final answer
    x = 5,062.31

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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.