Home / 18,128.40-27,192.87-11,153.09

Finding the Fourth Proportional to 18,128.40, 27,192.87 and 11,153.09

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Solution

The fourth proportional to 18,128.40, 27,192.87 and 11,153.09 is: 16,729.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,128.40 : 27,192.87 = 11,153.09 : x
  2. Step 2: Convert to fraction form
    18,128.40/27,192.87 = 11,153.09/x
  3. Step 3: Cross multiply
    18,128.40x = 27,192.87 × 11,153.09
  4. Step 4: Simplify right side
    18,128.40x = 303,284,390.50
  5. Step 5: Solve for x
    x = 303,284,390.50/18,128.40
  6. Step 6: Final answer
    x = 16,729.79

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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.