Home / 18,131.99-27,198.60-12,890.48

Finding the Fourth Proportional to 18,131.99, 27,198.60 and 12,890.48

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Solution

The fourth proportional to 18,131.99, 27,198.60 and 12,890.48 is: 19,336.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,131.99 : 27,198.60 = 12,890.48 : x
  2. Step 2: Convert to fraction form
    18,131.99/27,198.60 = 12,890.48/x
  3. Step 3: Cross multiply
    18,131.99x = 27,198.60 × 12,890.48
  4. Step 4: Simplify right side
    18,131.99x = 350,603,077.32
  5. Step 5: Solve for x
    x = 350,603,077.32/18,131.99
  6. Step 6: Final answer
    x = 19,336.16

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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.