Home / 20,508.94-30,753.78-12,190.06

Finding the Fourth Proportional to 20,508.94, 30,753.78 and 12,190.06

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Solution

The fourth proportional to 20,508.94, 30,753.78 and 12,190.06 is: 18,279.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,508.94 : 30,753.78 = 12,190.06 : x
  2. Step 2: Convert to fraction form
    20,508.94/30,753.78 = 12,190.06/x
  3. Step 3: Cross multiply
    20,508.94x = 30,753.78 × 12,190.06
  4. Step 4: Simplify right side
    20,508.94x = 374,890,423.43
  5. Step 5: Solve for x
    x = 374,890,423.43/20,508.94
  6. Step 6: Final answer
    x = 18,279.37

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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.