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Finding the Fourth Proportional to 18,557.91, 27,836.87 and 8,690.29

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Solution

The fourth proportional to 18,557.91, 27,836.87 and 8,690.29 is: 13,035.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,557.91 : 27,836.87 = 8,690.29 : x
  2. Step 2: Convert to fraction form
    18,557.91/27,836.87 = 8,690.29/x
  3. Step 3: Cross multiply
    18,557.91x = 27,836.87 × 8,690.29
  4. Step 4: Simplify right side
    18,557.91x = 241,910,359.95
  5. Step 5: Solve for x
    x = 241,910,359.95/18,557.91
  6. Step 6: Final answer
    x = 13,035.43

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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.