Home / 6,815.80-9,406.80-3,831.88

Finding the Fourth Proportional to 6,815.80, 9,406.80 and 3,831.88

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Solution

The fourth proportional to 6,815.80, 9,406.80 and 3,831.88 is: 5,288.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,815.80 : 9,406.80 = 3,831.88 : x
  2. Step 2: Convert to fraction form
    6,815.80/9,406.80 = 3,831.88/x
  3. Step 3: Cross multiply
    6,815.80x = 9,406.80 × 3,831.88
  4. Step 4: Simplify right side
    6,815.80x = 36,045,728.78
  5. Step 5: Solve for x
    x = 36,045,728.78/6,815.80
  6. Step 6: Final answer
    x = 5,288.55

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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.