Home / 3,678.87-5,518.85-1,213.95

Finding the Fourth Proportional to 3,678.87, 5,518.85 and 1,213.95

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Solution

The fourth proportional to 3,678.87, 5,518.85 and 1,213.95 is: 1,821.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.87 : 5,518.85 = 1,213.95 : x
  2. Step 2: Convert to fraction form
    3,678.87/5,518.85 = 1,213.95/x
  3. Step 3: Cross multiply
    3,678.87x = 5,518.85 × 1,213.95
  4. Step 4: Simplify right side
    3,678.87x = 6,699,607.96
  5. Step 5: Solve for x
    x = 6,699,607.96/3,678.87
  6. Step 6: Final answer
    x = 1,821.10

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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.