Home / 21,553.81-29,743.97-12,122.37

Finding the Fourth Proportional to 21,553.81, 29,743.97 and 12,122.37

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Solution

The fourth proportional to 21,553.81, 29,743.97 and 12,122.37 is: 16,728.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,553.81 : 29,743.97 = 12,122.37 : x
  2. Step 2: Convert to fraction form
    21,553.81/29,743.97 = 12,122.37/x
  3. Step 3: Cross multiply
    21,553.81x = 29,743.97 × 12,122.37
  4. Step 4: Simplify right side
    21,553.81x = 360,567,409.61
  5. Step 5: Solve for x
    x = 360,567,409.61/21,553.81
  6. Step 6: Final answer
    x = 16,728.71

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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.