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Finding the Fourth Proportional to 20,390.52, 30,546.24 and 11,936.52

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Solution

The fourth proportional to 20,390.52, 30,546.24 and 11,936.52 is: 17,881.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,390.52 : 30,546.24 = 11,936.52 : x
  2. Step 2: Convert to fraction form
    20,390.52/30,546.24 = 11,936.52/x
  3. Step 3: Cross multiply
    20,390.52x = 30,546.24 × 11,936.52
  4. Step 4: Simplify right side
    20,390.52x = 364,615,804.68
  5. Step 5: Solve for x
    x = 364,615,804.68/20,390.52
  6. Step 6: Final answer
    x = 17,881.63

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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.