Home / 7,945.21-11,918.39-2,101.75

Finding the Fourth Proportional to 7,945.21, 11,918.39 and 2,101.75

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Solution

The fourth proportional to 7,945.21, 11,918.39 and 2,101.75 is: 3,152.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,945.21 : 11,918.39 = 2,101.75 : x
  2. Step 2: Convert to fraction form
    7,945.21/11,918.39 = 2,101.75/x
  3. Step 3: Cross multiply
    7,945.21x = 11,918.39 × 2,101.75
  4. Step 4: Simplify right side
    7,945.21x = 25,049,465.67
  5. Step 5: Solve for x
    x = 25,049,465.67/7,945.21
  6. Step 6: Final answer
    x = 3,152.78

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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.