Home / 20,143.56-27,800.32-12,190.20

Finding the Fourth Proportional to 20,143.56, 27,800.32 and 12,190.20

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Solution

The fourth proportional to 20,143.56, 27,800.32 and 12,190.20 is: 16,823.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.56 : 27,800.32 = 12,190.20 : x
  2. Step 2: Convert to fraction form
    20,143.56/27,800.32 = 12,190.20/x
  3. Step 3: Cross multiply
    20,143.56x = 27,800.32 × 12,190.20
  4. Step 4: Simplify right side
    20,143.56x = 338,891,460.86
  5. Step 5: Solve for x
    x = 338,891,460.86/20,143.56
  6. Step 6: Final answer
    x = 16,823.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.