Home / 7,121.26-10,681.91-2,190.86

Finding the Fourth Proportional to 7,121.26, 10,681.91 and 2,190.86

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Solution

The fourth proportional to 7,121.26, 10,681.91 and 2,190.86 is: 3,286.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.26 : 10,681.91 = 2,190.86 : x
  2. Step 2: Convert to fraction form
    7,121.26/10,681.91 = 2,190.86/x
  3. Step 3: Cross multiply
    7,121.26x = 10,681.91 × 2,190.86
  4. Step 4: Simplify right side
    7,121.26x = 23,402,601.52
  5. Step 5: Solve for x
    x = 23,402,601.52/7,121.26
  6. Step 6: Final answer
    x = 3,286.30

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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.