Home / 12,782.22-19,180.22-5,391.80

Finding the Fourth Proportional to 12,782.22, 19,180.22 and 5,391.80

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Solution

The fourth proportional to 12,782.22, 19,180.22 and 5,391.80 is: 8,090.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,782.22 : 19,180.22 = 5,391.80 : x
  2. Step 2: Convert to fraction form
    12,782.22/19,180.22 = 5,391.80/x
  3. Step 3: Cross multiply
    12,782.22x = 19,180.22 × 5,391.80
  4. Step 4: Simplify right side
    12,782.22x = 103,415,910.20
  5. Step 5: Solve for x
    x = 103,415,910.20/12,782.22
  6. Step 6: Final answer
    x = 8,090.61

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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.