Home / 7,120.39-10,682.01-2,189.85

Finding the Fourth Proportional to 7,120.39, 10,682.01 and 2,189.85

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Solution

The fourth proportional to 7,120.39, 10,682.01 and 2,189.85 is: 3,285.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.39 : 10,682.01 = 2,189.85 : x
  2. Step 2: Convert to fraction form
    7,120.39/10,682.01 = 2,189.85/x
  3. Step 3: Cross multiply
    7,120.39x = 10,682.01 × 2,189.85
  4. Step 4: Simplify right side
    7,120.39x = 23,391,983.80
  5. Step 5: Solve for x
    x = 23,391,983.80/7,120.39
  6. Step 6: Final answer
    x = 3,285.21

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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.