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Finding the Fourth Proportional to 18,339.60, 27,506.70 and 5,193.30

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Solution

The fourth proportional to 18,339.60, 27,506.70 and 5,193.30 is: 7,789.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,339.60 : 27,506.70 = 5,193.30 : x
  2. Step 2: Convert to fraction form
    18,339.60/27,506.70 = 5,193.30/x
  3. Step 3: Cross multiply
    18,339.60x = 27,506.70 × 5,193.30
  4. Step 4: Simplify right side
    18,339.60x = 142,850,545.11
  5. Step 5: Solve for x
    x = 142,850,545.11/18,339.60
  6. Step 6: Final answer
    x = 7,789.19

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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.