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Finding the Fourth Proportional to 8,580.82, 12,870.21 and 3,895.89

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Solution

The fourth proportional to 8,580.82, 12,870.21 and 3,895.89 is: 5,843.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,580.82 : 12,870.21 = 3,895.89 : x
  2. Step 2: Convert to fraction form
    8,580.82/12,870.21 = 3,895.89/x
  3. Step 3: Cross multiply
    8,580.82x = 12,870.21 × 3,895.89
  4. Step 4: Simplify right side
    8,580.82x = 50,140,922.44
  5. Step 5: Solve for x
    x = 50,140,922.44/8,580.82
  6. Step 6: Final answer
    x = 5,843.37

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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.