Home / 21,021.26-28,999.23-13,072.82

Finding the Fourth Proportional to 21,021.26, 28,999.23 and 13,072.82

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Solution

The fourth proportional to 21,021.26, 28,999.23 and 13,072.82 is: 18,034.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.26 : 28,999.23 = 13,072.82 : x
  2. Step 2: Convert to fraction form
    21,021.26/28,999.23 = 13,072.82/x
  3. Step 3: Cross multiply
    21,021.26x = 28,999.23 × 13,072.82
  4. Step 4: Simplify right side
    21,021.26x = 379,101,713.93
  5. Step 5: Solve for x
    x = 379,101,713.93/21,021.26
  6. Step 6: Final answer
    x = 18,034.21

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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.