Home / 3,890.22-5,370.16-2,561.61

Finding the Fourth Proportional to 3,890.22, 5,370.16 and 2,561.61

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Solution

The fourth proportional to 3,890.22, 5,370.16 and 2,561.61 is: 3,536.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.22 : 5,370.16 = 2,561.61 : x
  2. Step 2: Convert to fraction form
    3,890.22/5,370.16 = 2,561.61/x
  3. Step 3: Cross multiply
    3,890.22x = 5,370.16 × 2,561.61
  4. Step 4: Simplify right side
    3,890.22x = 13,756,255.56
  5. Step 5: Solve for x
    x = 13,756,255.56/3,890.22
  6. Step 6: Final answer
    x = 3,536.11

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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.