Home / 20,144.94-30,186.63-8,451.78

Finding the Fourth Proportional to 20,144.94, 30,186.63 and 8,451.78

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Solution

The fourth proportional to 20,144.94, 30,186.63 and 8,451.78 is: 12,664.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,144.94 : 30,186.63 = 8,451.78 : x
  2. Step 2: Convert to fraction form
    20,144.94/30,186.63 = 8,451.78/x
  3. Step 3: Cross multiply
    20,144.94x = 30,186.63 × 8,451.78
  4. Step 4: Simplify right side
    20,144.94x = 255,130,755.70
  5. Step 5: Solve for x
    x = 255,130,755.70/20,144.94
  6. Step 6: Final answer
    x = 12,664.76

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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.