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Finding the Fourth Proportional to 18,129.26, 27,189.92 and 4,980.26

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Solution

The fourth proportional to 18,129.26, 27,189.92 and 4,980.26 is: 7,469.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,129.26 : 27,189.92 = 4,980.26 : x
  2. Step 2: Convert to fraction form
    18,129.26/27,189.92 = 4,980.26/x
  3. Step 3: Cross multiply
    18,129.26x = 27,189.92 × 4,980.26
  4. Step 4: Simplify right side
    18,129.26x = 135,412,870.98
  5. Step 5: Solve for x
    x = 135,412,870.98/18,129.26
  6. Step 6: Final answer
    x = 7,469.30

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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.