Home / 12,120.90-18,179.52-4,224.61

Finding the Fourth Proportional to 12,120.90, 18,179.52 and 4,224.61

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Solution

The fourth proportional to 12,120.90, 18,179.52 and 4,224.61 is: 6,336.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.90 : 18,179.52 = 4,224.61 : x
  2. Step 2: Convert to fraction form
    12,120.90/18,179.52 = 4,224.61/x
  3. Step 3: Cross multiply
    12,120.90x = 18,179.52 × 4,224.61
  4. Step 4: Simplify right side
    12,120.90x = 76,801,381.99
  5. Step 5: Solve for x
    x = 76,801,381.99/12,120.90
  6. Step 6: Final answer
    x = 6,336.28

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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.