Home / 21,162.26-31,743.84-7,122.71

Finding the Fourth Proportional to 21,162.26, 31,743.84 and 7,122.71

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Solution

The fourth proportional to 21,162.26, 31,743.84 and 7,122.71 is: 10,684.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,162.26 : 31,743.84 = 7,122.71 : x
  2. Step 2: Convert to fraction form
    21,162.26/31,743.84 = 7,122.71/x
  3. Step 3: Cross multiply
    21,162.26x = 31,743.84 × 7,122.71
  4. Step 4: Simplify right side
    21,162.26x = 226,102,166.61
  5. Step 5: Solve for x
    x = 226,102,166.61/21,162.26
  6. Step 6: Final answer
    x = 10,684.22

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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.