Home / 20,930.20-31,398.44-6,137.37

Finding the Fourth Proportional to 20,930.20, 31,398.44 and 6,137.37

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Solution

The fourth proportional to 20,930.20, 31,398.44 and 6,137.37 is: 9,206.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.20 : 31,398.44 = 6,137.37 : x
  2. Step 2: Convert to fraction form
    20,930.20/31,398.44 = 6,137.37/x
  3. Step 3: Cross multiply
    20,930.20x = 31,398.44 × 6,137.37
  4. Step 4: Simplify right side
    20,930.20x = 192,703,813.02
  5. Step 5: Solve for x
    x = 192,703,813.02/20,930.20
  6. Step 6: Final answer
    x = 9,206.98

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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.