Home / 13,786.11-19,019.68-8,117.39

Finding the Fourth Proportional to 13,786.11, 19,019.68 and 8,117.39

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Solution

The fourth proportional to 13,786.11, 19,019.68 and 8,117.39 is: 11,198.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,786.11 : 19,019.68 = 8,117.39 : x
  2. Step 2: Convert to fraction form
    13,786.11/19,019.68 = 8,117.39/x
  3. Step 3: Cross multiply
    13,786.11x = 19,019.68 × 8,117.39
  4. Step 4: Simplify right side
    13,786.11x = 154,390,187.49
  5. Step 5: Solve for x
    x = 154,390,187.49/13,786.11
  6. Step 6: Final answer
    x = 11,198.97

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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.