Home / 3,831.84-5,286.78-2,153.07

Finding the Fourth Proportional to 3,831.84, 5,286.78 and 2,153.07

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Solution

The fourth proportional to 3,831.84, 5,286.78 and 2,153.07 is: 2,970.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,831.84 : 5,286.78 = 2,153.07 : x
  2. Step 2: Convert to fraction form
    3,831.84/5,286.78 = 2,153.07/x
  3. Step 3: Cross multiply
    3,831.84x = 5,286.78 × 2,153.07
  4. Step 4: Simplify right side
    3,831.84x = 11,382,807.41
  5. Step 5: Solve for x
    x = 11,382,807.41/3,831.84
  6. Step 6: Final answer
    x = 2,970.59

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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.