Home / 7,780.14-11,664.72-3,881.79

Finding the Fourth Proportional to 7,780.14, 11,664.72 and 3,881.79

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Solution

The fourth proportional to 7,780.14, 11,664.72 and 3,881.79 is: 5,819.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,780.14 : 11,664.72 = 3,881.79 : x
  2. Step 2: Convert to fraction form
    7,780.14/11,664.72 = 3,881.79/x
  3. Step 3: Cross multiply
    7,780.14x = 11,664.72 × 3,881.79
  4. Step 4: Simplify right side
    7,780.14x = 45,279,993.45
  5. Step 5: Solve for x
    x = 45,279,993.45/7,780.14
  6. Step 6: Final answer
    x = 5,819.95

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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.