Home / 21,311.82-31,982.31-10,930.86

Finding the Fourth Proportional to 21,311.82, 31,982.31 and 10,930.86

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Solution

The fourth proportional to 21,311.82, 31,982.31 and 10,930.86 is: 16,403.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.82 : 31,982.31 = 10,930.86 : x
  2. Step 2: Convert to fraction form
    21,311.82/31,982.31 = 10,930.86/x
  3. Step 3: Cross multiply
    21,311.82x = 31,982.31 × 10,930.86
  4. Step 4: Simplify right side
    21,311.82x = 349,594,153.09
  5. Step 5: Solve for x
    x = 349,594,153.09/21,311.82
  6. Step 6: Final answer
    x = 16,403.77

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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.