Home / 25,991.88-38,951.10-20,121

Finding the Fourth Proportional to 25,991.88, 38,951.10 and 20,121

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Solution

The fourth proportional to 25,991.88, 38,951.10 and 20,121 is: 30,153.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,991.88 : 38,951.10 = 20,121 : x
  2. Step 2: Convert to fraction form
    25,991.88/38,951.10 = 20,121/x
  3. Step 3: Cross multiply
    25,991.88x = 38,951.10 × 20,121
  4. Step 4: Simplify right side
    25,991.88x = 783,735,083.10
  5. Step 5: Solve for x
    x = 783,735,083.10/25,991.88
  6. Step 6: Final answer
    x = 30,153.07

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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.