Home / 3,991.38-5,987.31-1,218.24

Finding the Fourth Proportional to 3,991.38, 5,987.31 and 1,218.24

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Solution

The fourth proportional to 3,991.38, 5,987.31 and 1,218.24 is: 1,827.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.38 : 5,987.31 = 1,218.24 : x
  2. Step 2: Convert to fraction form
    3,991.38/5,987.31 = 1,218.24/x
  3. Step 3: Cross multiply
    3,991.38x = 5,987.31 × 1,218.24
  4. Step 4: Simplify right side
    3,991.38x = 7,293,980.53
  5. Step 5: Solve for x
    x = 7,293,980.53/3,991.38
  6. Step 6: Final answer
    x = 1,827.43

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1.5x scale

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.