Home / 8,384.20-12,561.90-3,992.20

Finding the Fourth Proportional to 8,384.20, 12,561.90 and 3,992.20

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Solution

The fourth proportional to 8,384.20, 12,561.90 and 3,992.20 is: 5,981.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,384.20 : 12,561.90 = 3,992.20 : x
  2. Step 2: Convert to fraction form
    8,384.20/12,561.90 = 3,992.20/x
  3. Step 3: Cross multiply
    8,384.20x = 12,561.90 × 3,992.20
  4. Step 4: Simplify right side
    8,384.20x = 50,149,617.18
  5. Step 5: Solve for x
    x = 50,149,617.18/8,384.20
  6. Step 6: Final answer
    x = 5,981.44

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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.