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Finding the Fourth Proportional to 20,190.70, 30,286.05 and 10,326.70

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Solution

The fourth proportional to 20,190.70, 30,286.05 and 10,326.70 is: 15,490.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190.70 : 30,286.05 = 10,326.70 : x
  2. Step 2: Convert to fraction form
    20,190.70/30,286.05 = 10,326.70/x
  3. Step 3: Cross multiply
    20,190.70x = 30,286.05 × 10,326.70
  4. Step 4: Simplify right side
    20,190.70x = 312,754,952.54
  5. Step 5: Solve for x
    x = 312,754,952.54/20,190.70
  6. Step 6: Final answer
    x = 15,490.05

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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.