Home / 7,818.14-11,721.72-3,919.88

Finding the Fourth Proportional to 7,818.14, 11,721.72 and 3,919.88

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Solution

The fourth proportional to 7,818.14, 11,721.72 and 3,919.88 is: 5,877.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,818.14 : 11,721.72 = 3,919.88 : x
  2. Step 2: Convert to fraction form
    7,818.14/11,721.72 = 3,919.88/x
  3. Step 3: Cross multiply
    7,818.14x = 11,721.72 × 3,919.88
  4. Step 4: Simplify right side
    7,818.14x = 45,947,735.79
  5. Step 5: Solve for x
    x = 45,947,735.79/7,818.14
  6. Step 6: Final answer
    x = 5,877.07

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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.