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Finding the Fourth Proportional to 18,551.99, 27,837.11 and 8,689.56

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Solution

The fourth proportional to 18,551.99, 27,837.11 and 8,689.56 is: 13,038.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,551.99 : 27,837.11 = 8,689.56 : x
  2. Step 2: Convert to fraction form
    18,551.99/27,837.11 = 8,689.56/x
  3. Step 3: Cross multiply
    18,551.99x = 27,837.11 × 8,689.56
  4. Step 4: Simplify right side
    18,551.99x = 241,892,237.57
  5. Step 5: Solve for x
    x = 241,892,237.57/18,551.99
  6. Step 6: Final answer
    x = 13,038.61

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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.