Home / 7,121.52-10,683.70-2,190.97

Finding the Fourth Proportional to 7,121.52, 10,683.70 and 2,190.97

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Solution

The fourth proportional to 7,121.52, 10,683.70 and 2,190.97 is: 3,286.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.52 : 10,683.70 = 2,190.97 : x
  2. Step 2: Convert to fraction form
    7,121.52/10,683.70 = 2,190.97/x
  3. Step 3: Cross multiply
    7,121.52x = 10,683.70 × 2,190.97
  4. Step 4: Simplify right side
    7,121.52x = 23,407,674.07
  5. Step 5: Solve for x
    x = 23,407,674.07/7,121.52
  6. Step 6: Final answer
    x = 3,286.89

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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.