Home / 8,106.08-11,185.70-5,121.90

Finding the Fourth Proportional to 8,106.08, 11,185.70 and 5,121.90

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Solution

The fourth proportional to 8,106.08, 11,185.70 and 5,121.90 is: 7,067.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,106.08 : 11,185.70 = 5,121.90 : x
  2. Step 2: Convert to fraction form
    8,106.08/11,185.70 = 5,121.90/x
  3. Step 3: Cross multiply
    8,106.08x = 11,185.70 × 5,121.90
  4. Step 4: Simplify right side
    8,106.08x = 57,292,011.22
  5. Step 5: Solve for x
    x = 57,292,011.22/8,106.08
  6. Step 6: Final answer
    x = 7,067.79

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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.