Home / 7,948.74-11,921.94-2,105.76

Finding the Fourth Proportional to 7,948.74, 11,921.94 and 2,105.76

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Solution

The fourth proportional to 7,948.74, 11,921.94 and 2,105.76 is: 3,158.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,948.74 : 11,921.94 = 2,105.76 : x
  2. Step 2: Convert to fraction form
    7,948.74/11,921.94 = 2,105.76/x
  3. Step 3: Cross multiply
    7,948.74x = 11,921.94 × 2,105.76
  4. Step 4: Simplify right side
    7,948.74x = 25,104,744.37
  5. Step 5: Solve for x
    x = 25,104,744.37/7,948.74
  6. Step 6: Final answer
    x = 3,158.33

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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.