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Finding the Fourth Proportional to 18,611.08, 27,923.10 and 8,757.88

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Solution

The fourth proportional to 18,611.08, 27,923.10 and 8,757.88 is: 13,139.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,611.08 : 27,923.10 = 8,757.88 : x
  2. Step 2: Convert to fraction form
    18,611.08/27,923.10 = 8,757.88/x
  3. Step 3: Cross multiply
    18,611.08x = 27,923.10 × 8,757.88
  4. Step 4: Simplify right side
    18,611.08x = 244,547,159.03
  5. Step 5: Solve for x
    x = 244,547,159.03/18,611.08
  6. Step 6: Final answer
    x = 13,139.87

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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.