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Finding the Fourth Proportional to 8,269.89, 12,405.03 and 2,113.89

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Solution

The fourth proportional to 8,269.89, 12,405.03 and 2,113.89 is: 3,170.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,269.89 : 12,405.03 = 2,113.89 : x
  2. Step 2: Convert to fraction form
    8,269.89/12,405.03 = 2,113.89/x
  3. Step 3: Cross multiply
    8,269.89x = 12,405.03 × 2,113.89
  4. Step 4: Simplify right side
    8,269.89x = 26,222,868.87
  5. Step 5: Solve for x
    x = 26,222,868.87/8,269.89
  6. Step 6: Final answer
    x = 3,170.88

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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.