Home / 2,987.96-4,130.60-2,738.88

Finding the Fourth Proportional to 2,987.96, 4,130.60 and 2,738.88

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Solution

The fourth proportional to 2,987.96, 4,130.60 and 2,738.88 is: 3,786.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.96 : 4,130.60 = 2,738.88 : x
  2. Step 2: Convert to fraction form
    2,987.96/4,130.60 = 2,738.88/x
  3. Step 3: Cross multiply
    2,987.96x = 4,130.60 × 2,738.88
  4. Step 4: Simplify right side
    2,987.96x = 11,313,204.03
  5. Step 5: Solve for x
    x = 11,313,204.03/2,987.96
  6. Step 6: Final answer
    x = 3,786.27

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1.5x scale

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.