Home / 3,115.32-4,299-1,920.84

Finding the Fourth Proportional to 3,115.32, 4,299 and 1,920.84

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Solution

The fourth proportional to 3,115.32, 4,299 and 1,920.84 is: 2,650.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.32 : 4,299 = 1,920.84 : x
  2. Step 2: Convert to fraction form
    3,115.32/4,299 = 1,920.84/x
  3. Step 3: Cross multiply
    3,115.32x = 4,299 × 1,920.84
  4. Step 4: Simplify right side
    3,115.32x = 8,257,691.16
  5. Step 5: Solve for x
    x = 8,257,691.16/3,115.32
  6. Step 6: Final answer
    x = 2,650.67

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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.