Home / 8,786.82-12,126.60-5,431.80

Finding the Fourth Proportional to 8,786.82, 12,126.60 and 5,431.80

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Solution

The fourth proportional to 8,786.82, 12,126.60 and 5,431.80 is: 7,496.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,786.82 : 12,126.60 = 5,431.80 : x
  2. Step 2: Convert to fraction form
    8,786.82/12,126.60 = 5,431.80/x
  3. Step 3: Cross multiply
    8,786.82x = 12,126.60 × 5,431.80
  4. Step 4: Simplify right side
    8,786.82x = 65,869,265.88
  5. Step 5: Solve for x
    x = 65,869,265.88/8,786.82
  6. Step 6: Final answer
    x = 7,496.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.