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Finding the Fourth Proportional to 22,611.72, 33,920.10 and 7,821.96

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Solution

The fourth proportional to 22,611.72, 33,920.10 and 7,821.96 is: 11,733.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,611.72 : 33,920.10 = 7,821.96 : x
  2. Step 2: Convert to fraction form
    22,611.72/33,920.10 = 7,821.96/x
  3. Step 3: Cross multiply
    22,611.72x = 33,920.10 × 7,821.96
  4. Step 4: Simplify right side
    22,611.72x = 265,321,665.40
  5. Step 5: Solve for x
    x = 265,321,665.40/22,611.72
  6. Step 6: Final answer
    x = 11,733.81

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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.