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Finding the Fourth Proportional to 8,515.96, 12,769.62 and 3,895

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Solution

The fourth proportional to 8,515.96, 12,769.62 and 3,895 is: 5,840.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,515.96 : 12,769.62 = 3,895 : x
  2. Step 2: Convert to fraction form
    8,515.96/12,769.62 = 3,895/x
  3. Step 3: Cross multiply
    8,515.96x = 12,769.62 × 3,895
  4. Step 4: Simplify right side
    8,515.96x = 49,737,669.90
  5. Step 5: Solve for x
    x = 49,737,669.90/8,515.96
  6. Step 6: Final answer
    x = 5,840.52

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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.