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Finding the Fourth Proportional to 18,891.52, 28,338.88 and 5,744

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Solution

The fourth proportional to 18,891.52, 28,338.88 and 5,744 is: 8,616.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.52 : 28,338.88 = 5,744 : x
  2. Step 2: Convert to fraction form
    18,891.52/28,338.88 = 5,744/x
  3. Step 3: Cross multiply
    18,891.52x = 28,338.88 × 5,744
  4. Step 4: Simplify right side
    18,891.52x = 162,778,526.72
  5. Step 5: Solve for x
    x = 162,778,526.72/18,891.52
  6. Step 6: Final answer
    x = 8,616.49

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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.