Home / 11,875.86-17,811.19-3,979.49

Finding the Fourth Proportional to 11,875.86, 17,811.19 and 3,979.49

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Solution

The fourth proportional to 11,875.86, 17,811.19 and 3,979.49 is: 5,968.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,875.86 : 17,811.19 = 3,979.49 : x
  2. Step 2: Convert to fraction form
    11,875.86/17,811.19 = 3,979.49/x
  3. Step 3: Cross multiply
    11,875.86x = 17,811.19 × 3,979.49
  4. Step 4: Simplify right side
    11,875.86x = 70,879,481.06
  5. Step 5: Solve for x
    x = 70,879,481.06/11,875.86
  6. Step 6: Final answer
    x = 5,968.37

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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.