Home / 5,406.77-8,106.41-2,120.20

Finding the Fourth Proportional to 5,406.77, 8,106.41 and 2,120.20

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Solution

The fourth proportional to 5,406.77, 8,106.41 and 2,120.20 is: 3,178.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,406.77 : 8,106.41 = 2,120.20 : x
  2. Step 2: Convert to fraction form
    5,406.77/8,106.41 = 2,120.20/x
  3. Step 3: Cross multiply
    5,406.77x = 8,106.41 × 2,120.20
  4. Step 4: Simplify right side
    5,406.77x = 17,187,195.52
  5. Step 5: Solve for x
    x = 17,187,195.52/5,406.77
  6. Step 6: Final answer
    x = 3,178.83

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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.