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Finding the Fourth Proportional to 18,636.99, 27,918.59 and 12,067.80

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Solution

The fourth proportional to 18,636.99, 27,918.59 and 12,067.80 is: 18,077.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,636.99 : 27,918.59 = 12,067.80 : x
  2. Step 2: Convert to fraction form
    18,636.99/27,918.59 = 12,067.80/x
  3. Step 3: Cross multiply
    18,636.99x = 27,918.59 × 12,067.80
  4. Step 4: Simplify right side
    18,636.99x = 336,915,900.06
  5. Step 5: Solve for x
    x = 336,915,900.06/18,636.99
  6. Step 6: Final answer
    x = 18,077.81

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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.