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Finding the Fourth Proportional to 12,205.95, 18,308.15 and 3,891.95

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Solution

The fourth proportional to 12,205.95, 18,308.15 and 3,891.95 is: 5,837.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,205.95 : 18,308.15 = 3,891.95 : x
  2. Step 2: Convert to fraction form
    12,205.95/18,308.15 = 3,891.95/x
  3. Step 3: Cross multiply
    12,205.95x = 18,308.15 × 3,891.95
  4. Step 4: Simplify right side
    12,205.95x = 71,254,293.39
  5. Step 5: Solve for x
    x = 71,254,293.39/12,205.95
  6. Step 6: Final answer
    x = 5,837.67

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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.