Home / 21,255.90-31,882.62-8,109.60

Finding the Fourth Proportional to 21,255.90, 31,882.62 and 8,109.60

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Solution

The fourth proportional to 21,255.90, 31,882.62 and 8,109.60 is: 12,163.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,255.90 : 31,882.62 = 8,109.60 : x
  2. Step 2: Convert to fraction form
    21,255.90/31,882.62 = 8,109.60/x
  3. Step 3: Cross multiply
    21,255.90x = 31,882.62 × 8,109.60
  4. Step 4: Simplify right side
    21,255.90x = 258,555,295.15
  5. Step 5: Solve for x
    x = 258,555,295.15/21,255.90
  6. Step 6: Final answer
    x = 12,163.93

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1.5x scale

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.