Home / 3,831.81-5,286.36-2,415.12

Finding the Fourth Proportional to 3,831.81, 5,286.36 and 2,415.12

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Solution

The fourth proportional to 3,831.81, 5,286.36 and 2,415.12 is: 3,331.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,831.81 : 5,286.36 = 2,415.12 : x
  2. Step 2: Convert to fraction form
    3,831.81/5,286.36 = 2,415.12/x
  3. Step 3: Cross multiply
    3,831.81x = 5,286.36 × 2,415.12
  4. Step 4: Simplify right side
    3,831.81x = 12,767,193.76
  5. Step 5: Solve for x
    x = 12,767,193.76/3,831.81
  6. Step 6: Final answer
    x = 3,331.90

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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.