Home / 18,128.20-27,190.98-4,979.44

Finding the Fourth Proportional to 18,128.20, 27,190.98 and 4,979.44

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Solution

The fourth proportional to 18,128.20, 27,190.98 and 4,979.44 is: 7,468.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,128.20 : 27,190.98 = 4,979.44 : x
  2. Step 2: Convert to fraction form
    18,128.20/27,190.98 = 4,979.44/x
  3. Step 3: Cross multiply
    18,128.20x = 27,190.98 × 4,979.44
  4. Step 4: Simplify right side
    18,128.20x = 135,395,853.45
  5. Step 5: Solve for x
    x = 135,395,853.45/18,128.20
  6. Step 6: Final answer
    x = 7,468.80

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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.