Home / 8,520.72-12,772.78-4,135.78

Finding the Fourth Proportional to 8,520.72, 12,772.78 and 4,135.78

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Solution

The fourth proportional to 8,520.72, 12,772.78 and 4,135.78 is: 6,199.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,520.72 : 12,772.78 = 4,135.78 : x
  2. Step 2: Convert to fraction form
    8,520.72/12,772.78 = 4,135.78/x
  3. Step 3: Cross multiply
    8,520.72x = 12,772.78 × 4,135.78
  4. Step 4: Simplify right side
    8,520.72x = 52,825,408.07
  5. Step 5: Solve for x
    x = 52,825,408.07/8,520.72
  6. Step 6: Final answer
    x = 6,199.64

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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.