Home / 8,113.20-12,172.68-4,220.88

Finding the Fourth Proportional to 8,113.20, 12,172.68 and 4,220.88

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Solution

The fourth proportional to 8,113.20, 12,172.68 and 4,220.88 is: 6,332.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,113.20 : 12,172.68 = 4,220.88 : x
  2. Step 2: Convert to fraction form
    8,113.20/12,172.68 = 4,220.88/x
  3. Step 3: Cross multiply
    8,113.20x = 12,172.68 × 4,220.88
  4. Step 4: Simplify right side
    8,113.20x = 51,379,421.56
  5. Step 5: Solve for x
    x = 51,379,421.56/8,113.20
  6. Step 6: Final answer
    x = 6,332.82

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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.