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Finding the Fourth Proportional to 18,628.38, 27,946.65 and 8,100.03

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Solution

The fourth proportional to 18,628.38, 27,946.65 and 8,100.03 is: 12,151.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,628.38 : 27,946.65 = 8,100.03 : x
  2. Step 2: Convert to fraction form
    18,628.38/27,946.65 = 8,100.03/x
  3. Step 3: Cross multiply
    18,628.38x = 27,946.65 × 8,100.03
  4. Step 4: Simplify right side
    18,628.38x = 226,368,534.43
  5. Step 5: Solve for x
    x = 226,368,534.43/18,628.38
  6. Step 6: Final answer
    x = 12,151.81

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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.