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Finding the Fourth Proportional to 8,744.80, 13,116.60 and 2,821.60

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Solution

The fourth proportional to 8,744.80, 13,116.60 and 2,821.60 is: 4,232.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,744.80 : 13,116.60 = 2,821.60 : x
  2. Step 2: Convert to fraction form
    8,744.80/13,116.60 = 2,821.60/x
  3. Step 3: Cross multiply
    8,744.80x = 13,116.60 × 2,821.60
  4. Step 4: Simplify right side
    8,744.80x = 37,009,798.56
  5. Step 5: Solve for x
    x = 37,009,798.56/8,744.80
  6. Step 6: Final answer
    x = 4,232.21

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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.