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Finding the Fourth Proportional to 18,969.62, 28,454.31 and 5,821.61

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Solution

The fourth proportional to 18,969.62, 28,454.31 and 5,821.61 is: 8,732.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,969.62 : 28,454.31 = 5,821.61 : x
  2. Step 2: Convert to fraction form
    18,969.62/28,454.31 = 5,821.61/x
  3. Step 3: Cross multiply
    18,969.62x = 28,454.31 × 5,821.61
  4. Step 4: Simplify right side
    18,969.62x = 165,649,753.37
  5. Step 5: Solve for x
    x = 165,649,753.37/18,969.62
  6. Step 6: Final answer
    x = 8,732.37

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1.5x scale

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.