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Finding the Fourth Proportional to 18,991.22, 28,490.62 and 5,843.10

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Solution

The fourth proportional to 18,991.22, 28,490.62 and 5,843.10 is: 8,765.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.22 : 28,490.62 = 5,843.10 : x
  2. Step 2: Convert to fraction form
    18,991.22/28,490.62 = 5,843.10/x
  3. Step 3: Cross multiply
    18,991.22x = 28,490.62 × 5,843.10
  4. Step 4: Simplify right side
    18,991.22x = 166,473,541.72
  5. Step 5: Solve for x
    x = 166,473,541.72/18,991.22
  6. Step 6: Final answer
    x = 8,765.82

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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.