Home / 20,816.24-31,234.62-9,721.32

Finding the Fourth Proportional to 20,816.24, 31,234.62 and 9,721.32

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Solution

The fourth proportional to 20,816.24, 31,234.62 and 9,721.32 is: 14,586.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.24 : 31,234.62 = 9,721.32 : x
  2. Step 2: Convert to fraction form
    20,816.24/31,234.62 = 9,721.32/x
  3. Step 3: Cross multiply
    20,816.24x = 31,234.62 × 9,721.32
  4. Step 4: Simplify right side
    20,816.24x = 303,641,687.49
  5. Step 5: Solve for x
    x = 303,641,687.49/20,816.24
  6. Step 6: Final answer
    x = 14,586.77

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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.