Home / 3,678.60-5,518.70-1,213.22

Finding the Fourth Proportional to 3,678.60, 5,518.70 and 1,213.22

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Solution

The fourth proportional to 3,678.60, 5,518.70 and 1,213.22 is: 1,820.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.60 : 5,518.70 = 1,213.22 : x
  2. Step 2: Convert to fraction form
    3,678.60/5,518.70 = 1,213.22/x
  3. Step 3: Cross multiply
    3,678.60x = 5,518.70 × 1,213.22
  4. Step 4: Simplify right side
    3,678.60x = 6,695,397.21
  5. Step 5: Solve for x
    x = 6,695,397.21/3,678.60
  6. Step 6: Final answer
    x = 1,820.09

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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.