Home / 8,121.72-12,178.74-3,737.88

Finding the Fourth Proportional to 8,121.72, 12,178.74 and 3,737.88

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Solution

The fourth proportional to 8,121.72, 12,178.74 and 3,737.88 is: 5,605.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.72 : 12,178.74 = 3,737.88 : x
  2. Step 2: Convert to fraction form
    8,121.72/12,178.74 = 3,737.88/x
  3. Step 3: Cross multiply
    8,121.72x = 12,178.74 × 3,737.88
  4. Step 4: Simplify right side
    8,121.72x = 45,522,668.67
  5. Step 5: Solve for x
    x = 45,522,668.67/8,121.72
  6. Step 6: Final answer
    x = 5,605.05

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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.