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Finding the Fourth Proportional to 18,515.72, 27,798.12 and 11,033.12

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Solution

The fourth proportional to 18,515.72, 27,798.12 and 11,033.12 is: 16,564.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.72 : 27,798.12 = 11,033.12 : x
  2. Step 2: Convert to fraction form
    18,515.72/27,798.12 = 11,033.12/x
  3. Step 3: Cross multiply
    18,515.72x = 27,798.12 × 11,033.12
  4. Step 4: Simplify right side
    18,515.72x = 306,699,993.73
  5. Step 5: Solve for x
    x = 306,699,993.73/18,515.72
  6. Step 6: Final answer
    x = 16,564.30

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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.