Home / 5,112.86-7,668.14-1,991.79

Finding the Fourth Proportional to 5,112.86, 7,668.14 and 1,991.79

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Solution

The fourth proportional to 5,112.86, 7,668.14 and 1,991.79 is: 2,987.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,112.86 : 7,668.14 = 1,991.79 : x
  2. Step 2: Convert to fraction form
    5,112.86/7,668.14 = 1,991.79/x
  3. Step 3: Cross multiply
    5,112.86x = 7,668.14 × 1,991.79
  4. Step 4: Simplify right side
    5,112.86x = 15,273,314.61
  5. Step 5: Solve for x
    x = 15,273,314.61/5,112.86
  6. Step 6: Final answer
    x = 2,987.24

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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.