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Finding the Fourth Proportional to 18,894.77, 28,342.31 and 5,747.25

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Solution

The fourth proportional to 18,894.77, 28,342.31 and 5,747.25 is: 8,620.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,894.77 : 28,342.31 = 5,747.25 : x
  2. Step 2: Convert to fraction form
    18,894.77/28,342.31 = 5,747.25/x
  3. Step 3: Cross multiply
    18,894.77x = 28,342.31 × 5,747.25
  4. Step 4: Simplify right side
    18,894.77x = 162,890,418.69
  5. Step 5: Solve for x
    x = 162,890,418.69/18,894.77
  6. Step 6: Final answer
    x = 8,620.93

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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.