Home / 20,816.37-31,234.80-9,721.45

Finding the Fourth Proportional to 20,816.37, 31,234.80 and 9,721.45

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Solution

The fourth proportional to 20,816.37, 31,234.80 and 9,721.45 is: 14,586.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.37 : 31,234.80 = 9,721.45 : x
  2. Step 2: Convert to fraction form
    20,816.37/31,234.80 = 9,721.45/x
  3. Step 3: Cross multiply
    20,816.37x = 31,234.80 × 9,721.45
  4. Step 4: Simplify right side
    20,816.37x = 303,647,468.37
  5. Step 5: Solve for x
    x = 303,647,468.37/20,816.37
  6. Step 6: Final answer
    x = 14,586.96

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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.