Home / 20,809.21-31,212.99-11,467.75

Finding the Fourth Proportional to 20,809.21, 31,212.99 and 11,467.75

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Solution

The fourth proportional to 20,809.21, 31,212.99 and 11,467.75 is: 17,201.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.21 : 31,212.99 = 11,467.75 : x
  2. Step 2: Convert to fraction form
    20,809.21/31,212.99 = 11,467.75/x
  3. Step 3: Cross multiply
    20,809.21x = 31,212.99 × 11,467.75
  4. Step 4: Simplify right side
    20,809.21x = 357,942,737.40
  5. Step 5: Solve for x
    x = 357,942,737.40/20,809.21
  6. Step 6: Final answer
    x = 17,201.17

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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.