Home / 7,145.90-10,711.79-3,391.08

Finding the Fourth Proportional to 7,145.90, 10,711.79 and 3,391.08

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Solution

The fourth proportional to 7,145.90, 10,711.79 and 3,391.08 is: 5,083.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,145.90 : 10,711.79 = 3,391.08 : x
  2. Step 2: Convert to fraction form
    7,145.90/10,711.79 = 3,391.08/x
  3. Step 3: Cross multiply
    7,145.90x = 10,711.79 × 3,391.08
  4. Step 4: Simplify right side
    7,145.90x = 36,324,546.66
  5. Step 5: Solve for x
    x = 36,324,546.66/7,145.90
  6. Step 6: Final answer
    x = 5,083.27

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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.