Home / 7,121.92-10,683.60-1,928.32

Finding the Fourth Proportional to 7,121.92, 10,683.60 and 1,928.32

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Solution

The fourth proportional to 7,121.92, 10,683.60 and 1,928.32 is: 2,892.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.92 : 10,683.60 = 1,928.32 : x
  2. Step 2: Convert to fraction form
    7,121.92/10,683.60 = 1,928.32/x
  3. Step 3: Cross multiply
    7,121.92x = 10,683.60 × 1,928.32
  4. Step 4: Simplify right side
    7,121.92x = 20,601,399.55
  5. Step 5: Solve for x
    x = 20,601,399.55/7,121.92
  6. Step 6: Final answer
    x = 2,892.67

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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.