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Finding the Fourth Proportional to 15,878.88, 21,914.15 and 8,805.15

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Solution

The fourth proportional to 15,878.88, 21,914.15 and 8,805.15 is: 12,151.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,878.88 : 21,914.15 = 8,805.15 : x
  2. Step 2: Convert to fraction form
    15,878.88/21,914.15 = 8,805.15/x
  3. Step 3: Cross multiply
    15,878.88x = 21,914.15 × 8,805.15
  4. Step 4: Simplify right side
    15,878.88x = 192,957,333.85
  5. Step 5: Solve for x
    x = 192,957,333.85/15,878.88
  6. Step 6: Final answer
    x = 12,151.82

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.