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Finding the Fourth Proportional to 18,651.25, 27,987.86 and 8,263.09

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Solution

The fourth proportional to 18,651.25, 27,987.86 and 8,263.09 is: 12,399.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,651.25 : 27,987.86 = 8,263.09 : x
  2. Step 2: Convert to fraction form
    18,651.25/27,987.86 = 8,263.09/x
  3. Step 3: Cross multiply
    18,651.25x = 27,987.86 × 8,263.09
  4. Step 4: Simplify right side
    18,651.25x = 231,266,206.09
  5. Step 5: Solve for x
    x = 231,266,206.09/18,651.25
  6. Step 6: Final answer
    x = 12,399.50

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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.