Home / 20,982.75-31,474.26-5,400.51

Finding the Fourth Proportional to 20,982.75, 31,474.26 and 5,400.51

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Solution

The fourth proportional to 20,982.75, 31,474.26 and 5,400.51 is: 8,100.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982.75 : 31,474.26 = 5,400.51 : x
  2. Step 2: Convert to fraction form
    20,982.75/31,474.26 = 5,400.51/x
  3. Step 3: Cross multiply
    20,982.75x = 31,474.26 × 5,400.51
  4. Step 4: Simplify right side
    20,982.75x = 169,977,055.87
  5. Step 5: Solve for x
    x = 169,977,055.87/20,982.75
  6. Step 6: Final answer
    x = 8,100.80

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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.