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Finding the Fourth Proportional to 8,817.67, 13,221.49 and 6,815.65

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Solution

The fourth proportional to 8,817.67, 13,221.49 and 6,815.65 is: 10,219.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,817.67 : 13,221.49 = 6,815.65 : x
  2. Step 2: Convert to fraction form
    8,817.67/13,221.49 = 6,815.65/x
  3. Step 3: Cross multiply
    8,817.67x = 13,221.49 × 6,815.65
  4. Step 4: Simplify right side
    8,817.67x = 90,113,081.37
  5. Step 5: Solve for x
    x = 90,113,081.37/8,817.67
  6. Step 6: Final answer
    x = 10,219.60

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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.