Home / 2,987.74-4,121.04-2,739.88

Finding the Fourth Proportional to 2,987.74, 4,121.04 and 2,739.88

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Solution

The fourth proportional to 2,987.74, 4,121.04 and 2,739.88 is: 3,779.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.74 : 4,121.04 = 2,739.88 : x
  2. Step 2: Convert to fraction form
    2,987.74/4,121.04 = 2,739.88/x
  3. Step 3: Cross multiply
    2,987.74x = 4,121.04 × 2,739.88
  4. Step 4: Simplify right side
    2,987.74x = 11,291,155.08
  5. Step 5: Solve for x
    x = 11,291,155.08/2,987.74
  6. Step 6: Final answer
    x = 3,779.16

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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.