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Finding the Fourth Proportional to 13,358.40, 20,067.30 and 11,171.40

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Solution

The fourth proportional to 13,358.40, 20,067.30 and 11,171.40 is: 16,781.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,358.40 : 20,067.30 = 11,171.40 : x
  2. Step 2: Convert to fraction form
    13,358.40/20,067.30 = 11,171.40/x
  3. Step 3: Cross multiply
    13,358.40x = 20,067.30 × 11,171.40
  4. Step 4: Simplify right side
    13,358.40x = 224,179,835.22
  5. Step 5: Solve for x
    x = 224,179,835.22/13,358.40
  6. Step 6: Final answer
    x = 16,781.94

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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.