Home / 3,678.36-5,518.14-1,213.88

Finding the Fourth Proportional to 3,678.36, 5,518.14 and 1,213.88

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Solution

The fourth proportional to 3,678.36, 5,518.14 and 1,213.88 is: 1,821.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.36 : 5,518.14 = 1,213.88 : x
  2. Step 2: Convert to fraction form
    3,678.36/5,518.14 = 1,213.88/x
  3. Step 3: Cross multiply
    3,678.36x = 5,518.14 × 1,213.88
  4. Step 4: Simplify right side
    3,678.36x = 6,698,359.78
  5. Step 5: Solve for x
    x = 6,698,359.78/3,678.36
  6. Step 6: Final answer
    x = 1,821.02

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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.