Home / 4,119.72-5,685.21-2,231.31

Finding the Fourth Proportional to 4,119.72, 5,685.21 and 2,231.31

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Solution

The fourth proportional to 4,119.72, 5,685.21 and 2,231.31 is: 3,079.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,119.72 : 5,685.21 = 2,231.31 : x
  2. Step 2: Convert to fraction form
    4,119.72/5,685.21 = 2,231.31/x
  3. Step 3: Cross multiply
    4,119.72x = 5,685.21 × 2,231.31
  4. Step 4: Simplify right side
    4,119.72x = 12,685,465.93
  5. Step 5: Solve for x
    x = 12,685,465.93/4,119.72
  6. Step 6: Final answer
    x = 3,079.21

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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.