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Finding the Fourth Proportional to 8,611.22, 12,921.69 and 3,680.48

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Solution

The fourth proportional to 8,611.22, 12,921.69 and 3,680.48 is: 5,522.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611.22 : 12,921.69 = 3,680.48 : x
  2. Step 2: Convert to fraction form
    8,611.22/12,921.69 = 3,680.48/x
  3. Step 3: Cross multiply
    8,611.22x = 12,921.69 × 3,680.48
  4. Step 4: Simplify right side
    8,611.22x = 47,558,021.61
  5. Step 5: Solve for x
    x = 47,558,021.61/8,611.22
  6. Step 6: Final answer
    x = 5,522.80

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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.