Home / 5,409.89-8,113.47-2,121.19

Finding the Fourth Proportional to 5,409.89, 8,113.47 and 2,121.19

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Solution

The fourth proportional to 5,409.89, 8,113.47 and 2,121.19 is: 3,181.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,409.89 : 8,113.47 = 2,121.19 : x
  2. Step 2: Convert to fraction form
    5,409.89/8,113.47 = 2,121.19/x
  3. Step 3: Cross multiply
    5,409.89x = 8,113.47 × 2,121.19
  4. Step 4: Simplify right side
    5,409.89x = 17,210,183.19
  5. Step 5: Solve for x
    x = 17,210,183.19/5,409.89
  6. Step 6: Final answer
    x = 3,181.25

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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.