Home / 12,015.20-18,022.80-6,831.20

Finding the Fourth Proportional to 12,015.20, 18,022.80 and 6,831.20

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Solution

The fourth proportional to 12,015.20, 18,022.80 and 6,831.20 is: 10,246.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,015.20 : 18,022.80 = 6,831.20 : x
  2. Step 2: Convert to fraction form
    12,015.20/18,022.80 = 6,831.20/x
  3. Step 3: Cross multiply
    12,015.20x = 18,022.80 × 6,831.20
  4. Step 4: Simplify right side
    12,015.20x = 123,117,351.36
  5. Step 5: Solve for x
    x = 123,117,351.36/12,015.20
  6. Step 6: Final answer
    x = 10,246.80

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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.