Home / 12,211.05-18,316.38-3,890.95

Finding the Fourth Proportional to 12,211.05, 18,316.38 and 3,890.95

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Solution

The fourth proportional to 12,211.05, 18,316.38 and 3,890.95 is: 5,836.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,211.05 : 18,316.38 = 3,890.95 : x
  2. Step 2: Convert to fraction form
    12,211.05/18,316.38 = 3,890.95/x
  3. Step 3: Cross multiply
    12,211.05x = 18,316.38 × 3,890.95
  4. Step 4: Simplify right side
    12,211.05x = 71,268,172.86
  5. Step 5: Solve for x
    x = 71,268,172.86/12,211.05
  6. Step 6: Final answer
    x = 5,836.37

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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.