Home / 21,121.73-31,684.01-7,083.21

Finding the Fourth Proportional to 21,121.73, 31,684.01 and 7,083.21

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Solution

The fourth proportional to 21,121.73, 31,684.01 and 7,083.21 is: 10,625.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.73 : 31,684.01 = 7,083.21 : x
  2. Step 2: Convert to fraction form
    21,121.73/31,684.01 = 7,083.21/x
  3. Step 3: Cross multiply
    21,121.73x = 31,684.01 × 7,083.21
  4. Step 4: Simplify right side
    21,121.73x = 224,424,461.06
  5. Step 5: Solve for x
    x = 224,424,461.06/21,121.73
  6. Step 6: Final answer
    x = 10,625.29

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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.