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Finding the Fourth Proportional to 18,331.20, 27,496.80 and 4,480.20

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Solution

The fourth proportional to 18,331.20, 27,496.80 and 4,480.20 is: 6,720.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,331.20 : 27,496.80 = 4,480.20 : x
  2. Step 2: Convert to fraction form
    18,331.20/27,496.80 = 4,480.20/x
  3. Step 3: Cross multiply
    18,331.20x = 27,496.80 × 4,480.20
  4. Step 4: Simplify right side
    18,331.20x = 123,191,163.36
  5. Step 5: Solve for x
    x = 123,191,163.36/18,331.20
  6. Step 6: Final answer
    x = 6,720.30

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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.