Home / 2,831.94-3,909.96-2,086.74

Finding the Fourth Proportional to 2,831.94, 3,909.96 and 2,086.74

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Solution

The fourth proportional to 2,831.94, 3,909.96 and 2,086.74 is: 2,881.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,831.94 : 3,909.96 = 2,086.74 : x
  2. Step 2: Convert to fraction form
    2,831.94/3,909.96 = 2,086.74/x
  3. Step 3: Cross multiply
    2,831.94x = 3,909.96 × 2,086.74
  4. Step 4: Simplify right side
    2,831.94x = 8,159,069.93
  5. Step 5: Solve for x
    x = 8,159,069.93/2,831.94
  6. Step 6: Final answer
    x = 2,881.09

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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.