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Finding the Fourth Proportional to 8,787, 13,212.11 and 8,102.04

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Solution

The fourth proportional to 8,787, 13,212.11 and 8,102.04 is: 12,182.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,787 : 13,212.11 = 8,102.04 : x
  2. Step 2: Convert to fraction form
    8,787/13,212.11 = 8,102.04/x
  3. Step 3: Cross multiply
    8,787x = 13,212.11 × 8,102.04
  4. Step 4: Simplify right side
    8,787x = 107,045,043.70
  5. Step 5: Solve for x
    x = 107,045,043.70/8,787
  6. Step 6: Final answer
    x = 12,182.21

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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.