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Finding the Fourth Proportional to 18,908.61, 28,354.71 and 5,757.96

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Solution

The fourth proportional to 18,908.61, 28,354.71 and 5,757.96 is: 8,634.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,908.61 : 28,354.71 = 5,757.96 : x
  2. Step 2: Convert to fraction form
    18,908.61/28,354.71 = 5,757.96/x
  3. Step 3: Cross multiply
    18,908.61x = 28,354.71 × 5,757.96
  4. Step 4: Simplify right side
    18,908.61x = 163,265,285.99
  5. Step 5: Solve for x
    x = 163,265,285.99/18,908.61
  6. Step 6: Final answer
    x = 8,634.44

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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.