Home / 19,689.05-27,169.85-11,190.03

Finding the Fourth Proportional to 19,689.05, 27,169.85 and 11,190.03

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Solution

The fourth proportional to 19,689.05, 27,169.85 and 11,190.03 is: 15,441.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,689.05 : 27,169.85 = 11,190.03 : x
  2. Step 2: Convert to fraction form
    19,689.05/27,169.85 = 11,190.03/x
  3. Step 3: Cross multiply
    19,689.05x = 27,169.85 × 11,190.03
  4. Step 4: Simplify right side
    19,689.05x = 304,031,380.65
  5. Step 5: Solve for x
    x = 304,031,380.65/19,689.05
  6. Step 6: Final answer
    x = 15,441.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.