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Finding the Fourth Proportional to 20,314.60, 30,459.60 and 13,286.13

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Solution

The fourth proportional to 20,314.60, 30,459.60 and 13,286.13 is: 19,921.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,314.60 : 30,459.60 = 13,286.13 : x
  2. Step 2: Convert to fraction form
    20,314.60/30,459.60 = 13,286.13/x
  3. Step 3: Cross multiply
    20,314.60x = 30,459.60 × 13,286.13
  4. Step 4: Simplify right side
    20,314.60x = 404,690,205.35
  5. Step 5: Solve for x
    x = 404,690,205.35/20,314.60
  6. Step 6: Final answer
    x = 19,921.15

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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.