Home / 7,876.78-11,815.40-2,945.48

Finding the Fourth Proportional to 7,876.78, 11,815.40 and 2,945.48

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Solution

The fourth proportional to 7,876.78, 11,815.40 and 2,945.48 is: 4,418.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,876.78 : 11,815.40 = 2,945.48 : x
  2. Step 2: Convert to fraction form
    7,876.78/11,815.40 = 2,945.48/x
  3. Step 3: Cross multiply
    7,876.78x = 11,815.40 × 2,945.48
  4. Step 4: Simplify right side
    7,876.78x = 34,802,039.14
  5. Step 5: Solve for x
    x = 34,802,039.14/7,876.78
  6. Step 6: Final answer
    x = 4,418.31

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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.