Home / 20,084.78-30,128.67-6,757.81

Finding the Fourth Proportional to 20,084.78, 30,128.67 and 6,757.81

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Solution

The fourth proportional to 20,084.78, 30,128.67 and 6,757.81 is: 10,137.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,084.78 : 30,128.67 = 6,757.81 : x
  2. Step 2: Convert to fraction form
    20,084.78/30,128.67 = 6,757.81/x
  3. Step 3: Cross multiply
    20,084.78x = 30,128.67 × 6,757.81
  4. Step 4: Simplify right side
    20,084.78x = 203,603,752.09
  5. Step 5: Solve for x
    x = 203,603,752.09/20,084.78
  6. Step 6: Final answer
    x = 10,137.21

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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.