Home / 8,138.64-12,197.88-2,938.80

Finding the Fourth Proportional to 8,138.64, 12,197.88 and 2,938.80

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Solution

The fourth proportional to 8,138.64, 12,197.88 and 2,938.80 is: 4,404.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,138.64 : 12,197.88 = 2,938.80 : x
  2. Step 2: Convert to fraction form
    8,138.64/12,197.88 = 2,938.80/x
  3. Step 3: Cross multiply
    8,138.64x = 12,197.88 × 2,938.80
  4. Step 4: Simplify right side
    8,138.64x = 35,847,129.74
  5. Step 5: Solve for x
    x = 35,847,129.74/8,138.64
  6. Step 6: Final answer
    x = 4,404.56

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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.