Home / 8,121.54-11,196.57-5,135.88

Finding the Fourth Proportional to 8,121.54, 11,196.57 and 5,135.88

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Solution

The fourth proportional to 8,121.54, 11,196.57 and 5,135.88 is: 7,080.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.54 : 11,196.57 = 5,135.88 : x
  2. Step 2: Convert to fraction form
    8,121.54/11,196.57 = 5,135.88/x
  3. Step 3: Cross multiply
    8,121.54x = 11,196.57 × 5,135.88
  4. Step 4: Simplify right side
    8,121.54x = 57,504,239.93
  5. Step 5: Solve for x
    x = 57,504,239.93/8,121.54
  6. Step 6: Final answer
    x = 7,080.46

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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.