Home / 7,719.86-11,579.78-1,876.43

Finding the Fourth Proportional to 7,719.86, 11,579.78 and 1,876.43

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Solution

The fourth proportional to 7,719.86, 11,579.78 and 1,876.43 is: 2,814.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,719.86 : 11,579.78 = 1,876.43 : x
  2. Step 2: Convert to fraction form
    7,719.86/11,579.78 = 1,876.43/x
  3. Step 3: Cross multiply
    7,719.86x = 11,579.78 × 1,876.43
  4. Step 4: Simplify right side
    7,719.86x = 21,728,579.30
  5. Step 5: Solve for x
    x = 21,728,579.30/7,719.86
  6. Step 6: Final answer
    x = 2,814.64

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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.