Home / 2,987.18-4,120.98-1,939.04

Finding the Fourth Proportional to 2,987.18, 4,120.98 and 1,939.04

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Solution

The fourth proportional to 2,987.18, 4,120.98 and 1,939.04 is: 2,675.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.18 : 4,120.98 = 1,939.04 : x
  2. Step 2: Convert to fraction form
    2,987.18/4,120.98 = 1,939.04/x
  3. Step 3: Cross multiply
    2,987.18x = 4,120.98 × 1,939.04
  4. Step 4: Simplify right side
    2,987.18x = 7,990,745.06
  5. Step 5: Solve for x
    x = 7,990,745.06/2,987.18
  6. Step 6: Final answer
    x = 2,675.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.