Home / 21,390.22-29,504.59-13,721.37

Finding the Fourth Proportional to 21,390.22, 29,504.59 and 13,721.37

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Solution

The fourth proportional to 21,390.22, 29,504.59 and 13,721.37 is: 18,926.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.22 : 29,504.59 = 13,721.37 : x
  2. Step 2: Convert to fraction form
    21,390.22/29,504.59 = 13,721.37/x
  3. Step 3: Cross multiply
    21,390.22x = 29,504.59 × 13,721.37
  4. Step 4: Simplify right side
    21,390.22x = 404,843,396.09
  5. Step 5: Solve for x
    x = 404,843,396.09/21,390.22
  6. Step 6: Final answer
    x = 18,926.57

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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.