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Finding the Fourth Proportional to 8,609.20, 12,892.20 and 6,881.20

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Solution

The fourth proportional to 8,609.20, 12,892.20 and 6,881.20 is: 10,304.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,609.20 : 12,892.20 = 6,881.20 : x
  2. Step 2: Convert to fraction form
    8,609.20/12,892.20 = 6,881.20/x
  3. Step 3: Cross multiply
    8,609.20x = 12,892.20 × 6,881.20
  4. Step 4: Simplify right side
    8,609.20x = 88,713,806.64
  5. Step 5: Solve for x
    x = 88,713,806.64/8,609.20
  6. Step 6: Final answer
    x = 10,304.54

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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.