Home / 3,120.39-4,302.83-2,718.61

Finding the Fourth Proportional to 3,120.39, 4,302.83 and 2,718.61

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Solution

The fourth proportional to 3,120.39, 4,302.83 and 2,718.61 is: 3,748.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.39 : 4,302.83 = 2,718.61 : x
  2. Step 2: Convert to fraction form
    3,120.39/4,302.83 = 2,718.61/x
  3. Step 3: Cross multiply
    3,120.39x = 4,302.83 × 2,718.61
  4. Step 4: Simplify right side
    3,120.39x = 11,697,692.32
  5. Step 5: Solve for x
    x = 11,697,692.32/3,120.39
  6. Step 6: Final answer
    x = 3,748.79

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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.