Home / 7,878.36-11,815.88-3,493.02

Finding the Fourth Proportional to 7,878.36, 11,815.88 and 3,493.02

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Solution

The fourth proportional to 7,878.36, 11,815.88 and 3,493.02 is: 5,238.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.36 : 11,815.88 = 3,493.02 : x
  2. Step 2: Convert to fraction form
    7,878.36/11,815.88 = 3,493.02/x
  3. Step 3: Cross multiply
    7,878.36x = 11,815.88 × 3,493.02
  4. Step 4: Simplify right side
    7,878.36x = 41,273,037.35
  5. Step 5: Solve for x
    x = 41,273,037.35/7,878.36
  6. Step 6: Final answer
    x = 5,238.79

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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.