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Finding the Fourth Proportional to 19,991.97, 27,588.91 and 11,039.49

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Solution

The fourth proportional to 19,991.97, 27,588.91 and 11,039.49 is: 15,234.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,991.97 : 27,588.91 = 11,039.49 : x
  2. Step 2: Convert to fraction form
    19,991.97/27,588.91 = 11,039.49/x
  3. Step 3: Cross multiply
    19,991.97x = 27,588.91 × 11,039.49
  4. Step 4: Simplify right side
    19,991.97x = 304,567,358.11
  5. Step 5: Solve for x
    x = 304,567,358.11/19,991.97
  6. Step 6: Final answer
    x = 15,234.49

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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.