Home / 6,831.28-9,427.58-3,998.72

Finding the Fourth Proportional to 6,831.28, 9,427.58 and 3,998.72

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Solution

The fourth proportional to 6,831.28, 9,427.58 and 3,998.72 is: 5,518.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,831.28 : 9,427.58 = 3,998.72 : x
  2. Step 2: Convert to fraction form
    6,831.28/9,427.58 = 3,998.72/x
  3. Step 3: Cross multiply
    6,831.28x = 9,427.58 × 3,998.72
  4. Step 4: Simplify right side
    6,831.28x = 37,698,252.70
  5. Step 5: Solve for x
    x = 37,698,252.70/6,831.28
  6. Step 6: Final answer
    x = 5,518.48

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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.