Home / 8,520.35-12,780.20-4,136.63

Finding the Fourth Proportional to 8,520.35, 12,780.20 and 4,136.63

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Solution

The fourth proportional to 8,520.35, 12,780.20 and 4,136.63 is: 6,204.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,520.35 : 12,780.20 = 4,136.63 : x
  2. Step 2: Convert to fraction form
    8,520.35/12,780.20 = 4,136.63/x
  3. Step 3: Cross multiply
    8,520.35x = 12,780.20 × 4,136.63
  4. Step 4: Simplify right side
    8,520.35x = 52,866,905.17
  5. Step 5: Solve for x
    x = 52,866,905.17/8,520.35
  6. Step 6: Final answer
    x = 6,204.78

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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.