Home / 18,738.38-28,109.18-4,887.38

Finding the Fourth Proportional to 18,738.38, 28,109.18 and 4,887.38

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Solution

The fourth proportional to 18,738.38, 28,109.18 and 4,887.38 is: 7,331.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,738.38 : 28,109.18 = 4,887.38 : x
  2. Step 2: Convert to fraction form
    18,738.38/28,109.18 = 4,887.38/x
  3. Step 3: Cross multiply
    18,738.38x = 28,109.18 × 4,887.38
  4. Step 4: Simplify right side
    18,738.38x = 137,380,115.82
  5. Step 5: Solve for x
    x = 137,380,115.82/18,738.38
  6. Step 6: Final answer
    x = 7,331.49

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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.