Home / 21,223.13-31,786.21-10,137.66

Finding the Fourth Proportional to 21,223.13, 31,786.21 and 10,137.66

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Solution

The fourth proportional to 21,223.13, 31,786.21 and 10,137.66 is: 15,183.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,223.13 : 31,786.21 = 10,137.66 : x
  2. Step 2: Convert to fraction form
    21,223.13/31,786.21 = 10,137.66/x
  3. Step 3: Cross multiply
    21,223.13x = 31,786.21 × 10,137.66
  4. Step 4: Simplify right side
    21,223.13x = 322,237,683.14
  5. Step 5: Solve for x
    x = 322,237,683.14/21,223.13
  6. Step 6: Final answer
    x = 15,183.33

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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.