Home / 20,920.49-31,380.73-6,129.41

Finding the Fourth Proportional to 20,920.49, 31,380.73 and 6,129.41

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Solution

The fourth proportional to 20,920.49, 31,380.73 and 6,129.41 is: 9,194.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920.49 : 31,380.73 = 6,129.41 : x
  2. Step 2: Convert to fraction form
    20,920.49/31,380.73 = 6,129.41/x
  3. Step 3: Cross multiply
    20,920.49x = 31,380.73 × 6,129.41
  4. Step 4: Simplify right side
    20,920.49x = 192,345,222.52
  5. Step 5: Solve for x
    x = 192,345,222.52/20,920.49
  6. Step 6: Final answer
    x = 9,194.11

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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.