Home / 3,678.83-5,518.41-1,213.86

Finding the Fourth Proportional to 3,678.83, 5,518.41 and 1,213.86

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Solution

The fourth proportional to 3,678.83, 5,518.41 and 1,213.86 is: 1,820.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.83 : 5,518.41 = 1,213.86 : x
  2. Step 2: Convert to fraction form
    3,678.83/5,518.41 = 1,213.86/x
  3. Step 3: Cross multiply
    3,678.83x = 5,518.41 × 1,213.86
  4. Step 4: Simplify right side
    3,678.83x = 6,698,577.16
  5. Step 5: Solve for x
    x = 6,698,577.16/3,678.83
  6. Step 6: Final answer
    x = 1,820.85

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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.