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Finding the Fourth Proportional to 28,584.73, 42,881.64 and 8,859.21

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Solution

The fourth proportional to 28,584.73, 42,881.64 and 8,859.21 is: 13,290.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,584.73 : 42,881.64 = 8,859.21 : x
  2. Step 2: Convert to fraction form
    28,584.73/42,881.64 = 8,859.21/x
  3. Step 3: Cross multiply
    28,584.73x = 42,881.64 × 8,859.21
  4. Step 4: Simplify right side
    28,584.73x = 379,897,453.90
  5. Step 5: Solve for x
    x = 379,897,453.90/28,584.73
  6. Step 6: Final answer
    x = 13,290.22

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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.