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Finding the Fourth Proportional to 13,611.39, 18,786.78 and 8,892.96

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Solution

The fourth proportional to 13,611.39, 18,786.78 and 8,892.96 is: 12,274.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.39 : 18,786.78 = 8,892.96 : x
  2. Step 2: Convert to fraction form
    13,611.39/18,786.78 = 8,892.96/x
  3. Step 3: Cross multiply
    13,611.39x = 18,786.78 × 8,892.96
  4. Step 4: Simplify right side
    13,611.39x = 167,070,083.07
  5. Step 5: Solve for x
    x = 167,070,083.07/13,611.39
  6. Step 6: Final answer
    x = 12,274.29

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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.