Home / 20,982.25-31,463.11-9,879.58

Finding the Fourth Proportional to 20,982.25, 31,463.11 and 9,879.58

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Solution

The fourth proportional to 20,982.25, 31,463.11 and 9,879.58 is: 14,814.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982.25 : 31,463.11 = 9,879.58 : x
  2. Step 2: Convert to fraction form
    20,982.25/31,463.11 = 9,879.58/x
  3. Step 3: Cross multiply
    20,982.25x = 31,463.11 × 9,879.58
  4. Step 4: Simplify right side
    20,982.25x = 310,842,312.29
  5. Step 5: Solve for x
    x = 310,842,312.29/20,982.25
  6. Step 6: Final answer
    x = 14,814.54

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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.