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Finding the Fourth Proportional to 20,251.63, 30,392.97 and 13,229.74

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Solution

The fourth proportional to 20,251.63, 30,392.97 and 13,229.74 is: 19,854.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,251.63 : 30,392.97 = 13,229.74 : x
  2. Step 2: Convert to fraction form
    20,251.63/30,392.97 = 13,229.74/x
  3. Step 3: Cross multiply
    20,251.63x = 30,392.97 × 13,229.74
  4. Step 4: Simplify right side
    20,251.63x = 402,091,090.93
  5. Step 5: Solve for x
    x = 402,091,090.93/20,251.63
  6. Step 6: Final answer
    x = 19,854.75

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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.