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Finding the Fourth Proportional to 8,812.90, 13,221.17 and 2,969.96

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Solution

The fourth proportional to 8,812.90, 13,221.17 and 2,969.96 is: 4,455.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,812.90 : 13,221.17 = 2,969.96 : x
  2. Step 2: Convert to fraction form
    8,812.90/13,221.17 = 2,969.96/x
  3. Step 3: Cross multiply
    8,812.90x = 13,221.17 × 2,969.96
  4. Step 4: Simplify right side
    8,812.90x = 39,266,331.20
  5. Step 5: Solve for x
    x = 39,266,331.20/8,812.90
  6. Step 6: Final answer
    x = 4,455.55

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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.