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Finding the Fourth Proportional to 8,611.11, 12,938.54 and 5,492.61

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Solution

The fourth proportional to 8,611.11, 12,938.54 and 5,492.61 is: 8,252.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611.11 : 12,938.54 = 5,492.61 : x
  2. Step 2: Convert to fraction form
    8,611.11/12,938.54 = 5,492.61/x
  3. Step 3: Cross multiply
    8,611.11x = 12,938.54 × 5,492.61
  4. Step 4: Simplify right side
    8,611.11x = 71,066,326.73
  5. Step 5: Solve for x
    x = 71,066,326.73/8,611.11
  6. Step 6: Final answer
    x = 8,252.86

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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.