Home / 3,991.18-5,987.67-1,218.10

Finding the Fourth Proportional to 3,991.18, 5,987.67 and 1,218.10

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Solution

The fourth proportional to 3,991.18, 5,987.67 and 1,218.10 is: 1,827.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.18 : 5,987.67 = 1,218.10 : x
  2. Step 2: Convert to fraction form
    3,991.18/5,987.67 = 1,218.10/x
  3. Step 3: Cross multiply
    3,991.18x = 5,987.67 × 1,218.10
  4. Step 4: Simplify right side
    3,991.18x = 7,293,580.83
  5. Step 5: Solve for x
    x = 7,293,580.83/3,991.18
  6. Step 6: Final answer
    x = 1,827.42

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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.