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Finding the Fourth Proportional to 8,980.65, 13,469.06 and 2,821.29

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Solution

The fourth proportional to 8,980.65, 13,469.06 and 2,821.29 is: 4,231.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,980.65 : 13,469.06 = 2,821.29 : x
  2. Step 2: Convert to fraction form
    8,980.65/13,469.06 = 2,821.29/x
  3. Step 3: Cross multiply
    8,980.65x = 13,469.06 × 2,821.29
  4. Step 4: Simplify right side
    8,980.65x = 38,000,110.18
  5. Step 5: Solve for x
    x = 38,000,110.18/8,980.65
  6. Step 6: Final answer
    x = 4,231.33

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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.