Home / 7,122.43-10,679.73-2,190.70

Finding the Fourth Proportional to 7,122.43, 10,679.73 and 2,190.70

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Solution

The fourth proportional to 7,122.43, 10,679.73 and 2,190.70 is: 3,284.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.43 : 10,679.73 = 2,190.70 : x
  2. Step 2: Convert to fraction form
    7,122.43/10,679.73 = 2,190.70/x
  3. Step 3: Cross multiply
    7,122.43x = 10,679.73 × 2,190.70
  4. Step 4: Simplify right side
    7,122.43x = 23,396,084.51
  5. Step 5: Solve for x
    x = 23,396,084.51/7,122.43
  6. Step 6: Final answer
    x = 3,284.85

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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.