Home / 4,979.21-6,874.07-2,990.25

Finding the Fourth Proportional to 4,979.21, 6,874.07 and 2,990.25

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Solution

The fourth proportional to 4,979.21, 6,874.07 and 2,990.25 is: 4,128.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,979.21 : 6,874.07 = 2,990.25 : x
  2. Step 2: Convert to fraction form
    4,979.21/6,874.07 = 2,990.25/x
  3. Step 3: Cross multiply
    4,979.21x = 6,874.07 × 2,990.25
  4. Step 4: Simplify right side
    4,979.21x = 20,555,172.87
  5. Step 5: Solve for x
    x = 20,555,172.87/4,979.21
  6. Step 6: Final answer
    x = 4,128.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.