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Finding the Fourth Proportional to 18,489.40, 27,717.90 and 11,096.80

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Solution

The fourth proportional to 18,489.40, 27,717.90 and 11,096.80 is: 16,635.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,489.40 : 27,717.90 = 11,096.80 : x
  2. Step 2: Convert to fraction form
    18,489.40/27,717.90 = 11,096.80/x
  3. Step 3: Cross multiply
    18,489.40x = 27,717.90 × 11,096.80
  4. Step 4: Simplify right side
    18,489.40x = 307,579,992.72
  5. Step 5: Solve for x
    x = 307,579,992.72/18,489.40
  6. Step 6: Final answer
    x = 16,635.48

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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.