Home / 21,083.88-31,600.25-15,485.31

Finding the Fourth Proportional to 21,083.88, 31,600.25 and 15,485.31

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Solution

The fourth proportional to 21,083.88, 31,600.25 and 15,485.31 is: 23,209.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,083.88 : 31,600.25 = 15,485.31 : x
  2. Step 2: Convert to fraction form
    21,083.88/31,600.25 = 15,485.31/x
  3. Step 3: Cross multiply
    21,083.88x = 31,600.25 × 15,485.31
  4. Step 4: Simplify right side
    21,083.88x = 489,339,589.90
  5. Step 5: Solve for x
    x = 489,339,589.90/21,083.88
  6. Step 6: Final answer
    x = 23,209.18

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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.