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Finding the Fourth Proportional to 8,809.80, 13,215.90 and 3,261.80

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Solution

The fourth proportional to 8,809.80, 13,215.90 and 3,261.80 is: 4,893.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,809.80 : 13,215.90 = 3,261.80 : x
  2. Step 2: Convert to fraction form
    8,809.80/13,215.90 = 3,261.80/x
  3. Step 3: Cross multiply
    8,809.80x = 13,215.90 × 3,261.80
  4. Step 4: Simplify right side
    8,809.80x = 43,107,622.62
  5. Step 5: Solve for x
    x = 43,107,622.62/8,809.80
  6. Step 6: Final answer
    x = 4,893.14

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1.5x scale

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.