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Finding the Fourth Proportional to 18,785.76, 28,178.88 and 8,926

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Solution

The fourth proportional to 18,785.76, 28,178.88 and 8,926 is: 13,389.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,785.76 : 28,178.88 = 8,926 : x
  2. Step 2: Convert to fraction form
    18,785.76/28,178.88 = 8,926/x
  3. Step 3: Cross multiply
    18,785.76x = 28,178.88 × 8,926
  4. Step 4: Simplify right side
    18,785.76x = 251,524,682.88
  5. Step 5: Solve for x
    x = 251,524,682.88/18,785.76
  6. Step 6: Final answer
    x = 13,389.11

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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.