Home / 8,087.78-12,131.22-3,405.80

Finding the Fourth Proportional to 8,087.78, 12,131.22 and 3,405.80

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Solution

The fourth proportional to 8,087.78, 12,131.22 and 3,405.80 is: 5,108.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,087.78 : 12,131.22 = 3,405.80 : x
  2. Step 2: Convert to fraction form
    8,087.78/12,131.22 = 3,405.80/x
  3. Step 3: Cross multiply
    8,087.78x = 12,131.22 × 3,405.80
  4. Step 4: Simplify right side
    8,087.78x = 41,316,509.08
  5. Step 5: Solve for x
    x = 41,316,509.08/8,087.78
  6. Step 6: Final answer
    x = 5,108.51

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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.