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Finding the Fourth Proportional to 18,614.86, 27,917.70 and 11,120.47

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Solution

The fourth proportional to 18,614.86, 27,917.70 and 11,120.47 is: 16,677.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,614.86 : 27,917.70 = 11,120.47 : x
  2. Step 2: Convert to fraction form
    18,614.86/27,917.70 = 11,120.47/x
  3. Step 3: Cross multiply
    18,614.86x = 27,917.70 × 11,120.47
  4. Step 4: Simplify right side
    18,614.86x = 310,457,945.32
  5. Step 5: Solve for x
    x = 310,457,945.32/18,614.86
  6. Step 6: Final answer
    x = 16,677.96

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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.