Home / 18,142.38-27,190.03-8,139.74

Finding the Fourth Proportional to 18,142.38, 27,190.03 and 8,139.74

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Solution

The fourth proportional to 18,142.38, 27,190.03 and 8,139.74 is: 12,199.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,142.38 : 27,190.03 = 8,139.74 : x
  2. Step 2: Convert to fraction form
    18,142.38/27,190.03 = 8,139.74/x
  3. Step 3: Cross multiply
    18,142.38x = 27,190.03 × 8,139.74
  4. Step 4: Simplify right side
    18,142.38x = 221,319,786.70
  5. Step 5: Solve for x
    x = 221,319,786.70/18,142.38
  6. Step 6: Final answer
    x = 12,199.05

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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.