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Finding the Fourth Proportional to 28,584.67, 42,881.55 and 8,859.14

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Solution

The fourth proportional to 28,584.67, 42,881.55 and 8,859.14 is: 13,290.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,584.67 : 42,881.55 = 8,859.14 : x
  2. Step 2: Convert to fraction form
    28,584.67/42,881.55 = 8,859.14/x
  3. Step 3: Cross multiply
    28,584.67x = 42,881.55 × 8,859.14
  4. Step 4: Simplify right side
    28,584.67x = 379,893,728.85
  5. Step 5: Solve for x
    x = 379,893,728.85/28,584.67
  6. Step 6: Final answer
    x = 13,290.12

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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.