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Finding the Fourth Proportional to 22,611.61, 31,204.11 and 12,540.99

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Solution

The fourth proportional to 22,611.61, 31,204.11 and 12,540.99 is: 17,306.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,611.61 : 31,204.11 = 12,540.99 : x
  2. Step 2: Convert to fraction form
    22,611.61/31,204.11 = 12,540.99/x
  3. Step 3: Cross multiply
    22,611.61x = 31,204.11 × 12,540.99
  4. Step 4: Simplify right side
    22,611.61x = 391,330,296.96
  5. Step 5: Solve for x
    x = 391,330,296.96/22,611.61
  6. Step 6: Final answer
    x = 17,306.61

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.