Home / 3,678.68-5,518.12-1,081.70

Finding the Fourth Proportional to 3,678.68, 5,518.12 and 1,081.70

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Solution

The fourth proportional to 3,678.68, 5,518.12 and 1,081.70 is: 1,622.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.68 : 5,518.12 = 1,081.70 : x
  2. Step 2: Convert to fraction form
    3,678.68/5,518.12 = 1,081.70/x
  3. Step 3: Cross multiply
    3,678.68x = 5,518.12 × 1,081.70
  4. Step 4: Simplify right side
    3,678.68x = 5,968,950.40
  5. Step 5: Solve for x
    x = 5,968,950.40/3,678.68
  6. Step 6: Final answer
    x = 1,622.58

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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.