Home / 3,020.99-4,172.12-2,079.21

Finding the Fourth Proportional to 3,020.99, 4,172.12 and 2,079.21

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Solution

The fourth proportional to 3,020.99, 4,172.12 and 2,079.21 is: 2,871.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,020.99 : 4,172.12 = 2,079.21 : x
  2. Step 2: Convert to fraction form
    3,020.99/4,172.12 = 2,079.21/x
  3. Step 3: Cross multiply
    3,020.99x = 4,172.12 × 2,079.21
  4. Step 4: Simplify right side
    3,020.99x = 8,674,708.39
  5. Step 5: Solve for x
    x = 8,674,708.39/3,020.99
  6. Step 6: Final answer
    x = 2,871.48

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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.