Home / 21,072.26-29,080.29-12,579.31

Finding the Fourth Proportional to 21,072.26, 29,080.29 and 12,579.31

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Solution

The fourth proportional to 21,072.26, 29,080.29 and 12,579.31 is: 17,359.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,072.26 : 29,080.29 = 12,579.31 : x
  2. Step 2: Convert to fraction form
    21,072.26/29,080.29 = 12,579.31/x
  3. Step 3: Cross multiply
    21,072.26x = 29,080.29 × 12,579.31
  4. Step 4: Simplify right side
    21,072.26x = 365,810,086.95
  5. Step 5: Solve for x
    x = 365,810,086.95/21,072.26
  6. Step 6: Final answer
    x = 17,359.79

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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.