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Finding the Fourth Proportional to 20,131.70, 30,197.55 and 9,043.70

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Solution

The fourth proportional to 20,131.70, 30,197.55 and 9,043.70 is: 13,565.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.70 : 30,197.55 = 9,043.70 : x
  2. Step 2: Convert to fraction form
    20,131.70/30,197.55 = 9,043.70/x
  3. Step 3: Cross multiply
    20,131.70x = 30,197.55 × 9,043.70
  4. Step 4: Simplify right side
    20,131.70x = 273,097,582.94
  5. Step 5: Solve for x
    x = 273,097,582.94/20,131.70
  6. Step 6: Final answer
    x = 13,565.55

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Double scale
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Similar ratio
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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.