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Finding the Fourth Proportional to 20,086.51, 27,721.04 and 11,136.82

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Solution

The fourth proportional to 20,086.51, 27,721.04 and 11,136.82 is: 15,369.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,086.51 : 27,721.04 = 11,136.82 : x
  2. Step 2: Convert to fraction form
    20,086.51/27,721.04 = 11,136.82/x
  3. Step 3: Cross multiply
    20,086.51x = 27,721.04 × 11,136.82
  4. Step 4: Simplify right side
    20,086.51x = 308,724,232.69
  5. Step 5: Solve for x
    x = 308,724,232.69/20,086.51
  6. Step 6: Final answer
    x = 15,369.73

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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.