Home / 3,831.42-5,742.54-1,981.56

Finding the Fourth Proportional to 3,831.42, 5,742.54 and 1,981.56

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Solution

The fourth proportional to 3,831.42, 5,742.54 and 1,981.56 is: 2,969.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,831.42 : 5,742.54 = 1,981.56 : x
  2. Step 2: Convert to fraction form
    3,831.42/5,742.54 = 1,981.56/x
  3. Step 3: Cross multiply
    3,831.42x = 5,742.54 × 1,981.56
  4. Step 4: Simplify right side
    3,831.42x = 11,379,187.56
  5. Step 5: Solve for x
    x = 11,379,187.56/3,831.42
  6. Step 6: Final answer
    x = 2,969.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.