Home / 8,151.20-12,219.60-4,860.80

Finding the Fourth Proportional to 8,151.20, 12,219.60 and 4,860.80

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Solution

The fourth proportional to 8,151.20, 12,219.60 and 4,860.80 is: 7,286.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,151.20 : 12,219.60 = 4,860.80 : x
  2. Step 2: Convert to fraction form
    8,151.20/12,219.60 = 4,860.80/x
  3. Step 3: Cross multiply
    8,151.20x = 12,219.60 × 4,860.80
  4. Step 4: Simplify right side
    8,151.20x = 59,397,031.68
  5. Step 5: Solve for x
    x = 59,397,031.68/8,151.20
  6. Step 6: Final answer
    x = 7,286.91

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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.