Home / 3,979.86-5,971.48-2,130.50

Finding the Fourth Proportional to 3,979.86, 5,971.48 and 2,130.50

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Solution

The fourth proportional to 3,979.86, 5,971.48 and 2,130.50 is: 3,196.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.86 : 5,971.48 = 2,130.50 : x
  2. Step 2: Convert to fraction form
    3,979.86/5,971.48 = 2,130.50/x
  3. Step 3: Cross multiply
    3,979.86x = 5,971.48 × 2,130.50
  4. Step 4: Simplify right side
    3,979.86x = 12,722,238.14
  5. Step 5: Solve for x
    x = 12,722,238.14/3,979.86
  6. Step 6: Final answer
    x = 3,196.65

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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.