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Finding the Fourth Proportional to 8,711.40, 13,067.10 and 5,212.20

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Solution

The fourth proportional to 8,711.40, 13,067.10 and 5,212.20 is: 7,818.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,711.40 : 13,067.10 = 5,212.20 : x
  2. Step 2: Convert to fraction form
    8,711.40/13,067.10 = 5,212.20/x
  3. Step 3: Cross multiply
    8,711.40x = 13,067.10 × 5,212.20
  4. Step 4: Simplify right side
    8,711.40x = 68,108,338.62
  5. Step 5: Solve for x
    x = 68,108,338.62/8,711.40
  6. Step 6: Final answer
    x = 7,818.30

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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.