Home / 7,876.28-11,815.62-2,680.94

Finding the Fourth Proportional to 7,876.28, 11,815.62 and 2,680.94

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Solution

The fourth proportional to 7,876.28, 11,815.62 and 2,680.94 is: 4,021.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,876.28 : 11,815.62 = 2,680.94 : x
  2. Step 2: Convert to fraction form
    7,876.28/11,815.62 = 2,680.94/x
  3. Step 3: Cross multiply
    7,876.28x = 11,815.62 × 2,680.94
  4. Step 4: Simplify right side
    7,876.28x = 31,676,943.46
  5. Step 5: Solve for x
    x = 31,676,943.46/7,876.28
  6. Step 6: Final answer
    x = 4,021.82

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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.