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Finding the Fourth Proportional to 8,426.70, 12,636.81 and 3,493.80

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Solution

The fourth proportional to 8,426.70, 12,636.81 and 3,493.80 is: 5,239.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,426.70 : 12,636.81 = 3,493.80 : x
  2. Step 2: Convert to fraction form
    8,426.70/12,636.81 = 3,493.80/x
  3. Step 3: Cross multiply
    8,426.70x = 12,636.81 × 3,493.80
  4. Step 4: Simplify right side
    8,426.70x = 44,150,486.78
  5. Step 5: Solve for x
    x = 44,150,486.78/8,426.70
  6. Step 6: Final answer
    x = 5,239.36

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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.