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Finding the Fourth Proportional to 18,908.52, 28,359.24 and 5,578.68

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Solution

The fourth proportional to 18,908.52, 28,359.24 and 5,578.68 is: 8,366.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,908.52 : 28,359.24 = 5,578.68 : x
  2. Step 2: Convert to fraction form
    18,908.52/28,359.24 = 5,578.68/x
  3. Step 3: Cross multiply
    18,908.52x = 28,359.24 × 5,578.68
  4. Step 4: Simplify right side
    18,908.52x = 158,207,125.00
  5. Step 5: Solve for x
    x = 158,207,125.00/18,908.52
  6. Step 6: Final answer
    x = 8,366.98

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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.