Home / 8,515.42-12,768.70-3,831.38

Finding the Fourth Proportional to 8,515.42, 12,768.70 and 3,831.38

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Solution

The fourth proportional to 8,515.42, 12,768.70 and 3,831.38 is: 5,745.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,515.42 : 12,768.70 = 3,831.38 : x
  2. Step 2: Convert to fraction form
    8,515.42/12,768.70 = 3,831.38/x
  3. Step 3: Cross multiply
    8,515.42x = 12,768.70 × 3,831.38
  4. Step 4: Simplify right side
    8,515.42x = 48,921,741.81
  5. Step 5: Solve for x
    x = 48,921,741.81/8,515.42
  6. Step 6: Final answer
    x = 5,745.08

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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.