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Finding the Fourth Proportional to 18,453.80, 27,661.80 and 9,079.40

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Solution

The fourth proportional to 18,453.80, 27,661.80 and 9,079.40 is: 13,609.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,453.80 : 27,661.80 = 9,079.40 : x
  2. Step 2: Convert to fraction form
    18,453.80/27,661.80 = 9,079.40/x
  3. Step 3: Cross multiply
    18,453.80x = 27,661.80 × 9,079.40
  4. Step 4: Simplify right side
    18,453.80x = 251,152,546.92
  5. Step 5: Solve for x
    x = 251,152,546.92/18,453.80
  6. Step 6: Final answer
    x = 13,609.80

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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.