Home / 7,121.68-10,683.73-2,191.21

Finding the Fourth Proportional to 7,121.68, 10,683.73 and 2,191.21

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Solution

The fourth proportional to 7,121.68, 10,683.73 and 2,191.21 is: 3,287.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.68 : 10,683.73 = 2,191.21 : x
  2. Step 2: Convert to fraction form
    7,121.68/10,683.73 = 2,191.21/x
  3. Step 3: Cross multiply
    7,121.68x = 10,683.73 × 2,191.21
  4. Step 4: Simplify right side
    7,121.68x = 23,410,296.01
  5. Step 5: Solve for x
    x = 23,410,296.01/7,121.68
  6. Step 6: Final answer
    x = 3,287.19

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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.