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Finding the Fourth Proportional to 20,326.60, 30,489.90 and 13,350.70

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Solution

The fourth proportional to 20,326.60, 30,489.90 and 13,350.70 is: 20,026.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,326.60 : 30,489.90 = 13,350.70 : x
  2. Step 2: Convert to fraction form
    20,326.60/30,489.90 = 13,350.70/x
  3. Step 3: Cross multiply
    20,326.60x = 30,489.90 × 13,350.70
  4. Step 4: Simplify right side
    20,326.60x = 407,061,507.93
  5. Step 5: Solve for x
    x = 407,061,507.93/20,326.60
  6. Step 6: Final answer
    x = 20,026.05

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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.