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Finding the Fourth Proportional to 33,903.63, 50,865.17 and 13,128.75

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Solution

The fourth proportional to 33,903.63, 50,865.17 and 13,128.75 is: 19,696.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,903.63 : 50,865.17 = 13,128.75 : x
  2. Step 2: Convert to fraction form
    33,903.63/50,865.17 = 13,128.75/x
  3. Step 3: Cross multiply
    33,903.63x = 50,865.17 × 13,128.75
  4. Step 4: Simplify right side
    33,903.63x = 667,796,034.99
  5. Step 5: Solve for x
    x = 667,796,034.99/33,903.63
  6. Step 6: Final answer
    x = 19,696.89

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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.