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Finding the Fourth Proportional to 18,339.63, 27,508.92 and 5,191.97

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Solution

The fourth proportional to 18,339.63, 27,508.92 and 5,191.97 is: 7,787.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,339.63 : 27,508.92 = 5,191.97 : x
  2. Step 2: Convert to fraction form
    18,339.63/27,508.92 = 5,191.97/x
  3. Step 3: Cross multiply
    18,339.63x = 27,508.92 × 5,191.97
  4. Step 4: Simplify right side
    18,339.63x = 142,825,330.36
  5. Step 5: Solve for x
    x = 142,825,330.36/18,339.63
  6. Step 6: Final answer
    x = 7,787.80

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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.