Home / 21,169.88-31,743.58-7,125.22

Finding the Fourth Proportional to 21,169.88, 31,743.58 and 7,125.22

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Solution

The fourth proportional to 21,169.88, 31,743.58 and 7,125.22 is: 10,684.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,169.88 : 31,743.58 = 7,125.22 : x
  2. Step 2: Convert to fraction form
    21,169.88/31,743.58 = 7,125.22/x
  3. Step 3: Cross multiply
    21,169.88x = 31,743.58 × 7,125.22
  4. Step 4: Simplify right side
    21,169.88x = 226,179,991.09
  5. Step 5: Solve for x
    x = 226,179,991.09/21,169.88
  6. Step 6: Final answer
    x = 10,684.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.