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Finding the Fourth Proportional to 19,991.76, 27,588.50 and 11,039.82

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Solution

The fourth proportional to 19,991.76, 27,588.50 and 11,039.82 is: 15,234.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,991.76 : 27,588.50 = 11,039.82 : x
  2. Step 2: Convert to fraction form
    19,991.76/27,588.50 = 11,039.82/x
  3. Step 3: Cross multiply
    19,991.76x = 27,588.50 × 11,039.82
  4. Step 4: Simplify right side
    19,991.76x = 304,572,074.07
  5. Step 5: Solve for x
    x = 304,572,074.07/19,991.76
  6. Step 6: Final answer
    x = 15,234.88

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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.