Home / 2,987.60-4,119.84-2,749.48

Finding the Fourth Proportional to 2,987.60, 4,119.84 and 2,749.48

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Solution

The fourth proportional to 2,987.60, 4,119.84 and 2,749.48 is: 3,791.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.60 : 4,119.84 = 2,749.48 : x
  2. Step 2: Convert to fraction form
    2,987.60/4,119.84 = 2,749.48/x
  3. Step 3: Cross multiply
    2,987.60x = 4,119.84 × 2,749.48
  4. Step 4: Simplify right side
    2,987.60x = 11,327,417.68
  5. Step 5: Solve for x
    x = 11,327,417.68/2,987.60
  6. Step 6: Final answer
    x = 3,791.48

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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.