Home / 21,321.90-31,982.82-5,739.54

Finding the Fourth Proportional to 21,321.90, 31,982.82 and 5,739.54

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Solution

The fourth proportional to 21,321.90, 31,982.82 and 5,739.54 is: 8,609.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,321.90 : 31,982.82 = 5,739.54 : x
  2. Step 2: Convert to fraction form
    21,321.90/31,982.82 = 5,739.54/x
  3. Step 3: Cross multiply
    21,321.90x = 31,982.82 × 5,739.54
  4. Step 4: Simplify right side
    21,321.90x = 183,566,674.70
  5. Step 5: Solve for x
    x = 183,566,674.70/21,321.90
  6. Step 6: Final answer
    x = 8,609.30

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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.