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Finding the Fourth Proportional to 28,584.90, 42,878.25 and 8,863.61

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Solution

The fourth proportional to 28,584.90, 42,878.25 and 8,863.61 is: 13,295.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,584.90 : 42,878.25 = 8,863.61 : x
  2. Step 2: Convert to fraction form
    28,584.90/42,878.25 = 8,863.61/x
  3. Step 3: Cross multiply
    28,584.90x = 42,878.25 × 8,863.61
  4. Step 4: Simplify right side
    28,584.90x = 380,055,871.09
  5. Step 5: Solve for x
    x = 380,055,871.09/28,584.90
  6. Step 6: Final answer
    x = 13,295.69

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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.