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Finding the Fourth Proportional to 18,660.89, 27,983.17 and 9,893.81

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Solution

The fourth proportional to 18,660.89, 27,983.17 and 9,893.81 is: 14,836.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,660.89 : 27,983.17 = 9,893.81 : x
  2. Step 2: Convert to fraction form
    18,660.89/27,983.17 = 9,893.81/x
  3. Step 3: Cross multiply
    18,660.89x = 27,983.17 × 9,893.81
  4. Step 4: Simplify right side
    18,660.89x = 276,860,167.18
  5. Step 5: Solve for x
    x = 276,860,167.18/18,660.89
  6. Step 6: Final answer
    x = 14,836.39

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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.