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Finding the Fourth Proportional to 20,393.42, 30,540.90 and 11,601.68

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Solution

The fourth proportional to 20,393.42, 30,540.90 and 11,601.68 is: 17,374.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,393.42 : 30,540.90 = 11,601.68 : x
  2. Step 2: Convert to fraction form
    20,393.42/30,540.90 = 11,601.68/x
  3. Step 3: Cross multiply
    20,393.42x = 30,540.90 × 11,601.68
  4. Step 4: Simplify right side
    20,393.42x = 354,325,748.71
  5. Step 5: Solve for x
    x = 354,325,748.71/20,393.42
  6. Step 6: Final answer
    x = 17,374.51

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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.