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Finding the Fourth Proportional to 18,269.60, 27,405.41 and 8,917.59

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Solution

The fourth proportional to 18,269.60, 27,405.41 and 8,917.59 is: 13,376.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,269.60 : 27,405.41 = 8,917.59 : x
  2. Step 2: Convert to fraction form
    18,269.60/27,405.41 = 8,917.59/x
  3. Step 3: Cross multiply
    18,269.60x = 27,405.41 × 8,917.59
  4. Step 4: Simplify right side
    18,269.60x = 244,390,165.57
  5. Step 5: Solve for x
    x = 244,390,165.57/18,269.60
  6. Step 6: Final answer
    x = 13,376.88

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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.