Home / 12,891.21-19,336.99-3,657.21

Finding the Fourth Proportional to 12,891.21, 19,336.99 and 3,657.21

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Solution

The fourth proportional to 12,891.21, 19,336.99 and 3,657.21 is: 5,485.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,891.21 : 19,336.99 = 3,657.21 : x
  2. Step 2: Convert to fraction form
    12,891.21/19,336.99 = 3,657.21/x
  3. Step 3: Cross multiply
    12,891.21x = 19,336.99 × 3,657.21
  4. Step 4: Simplify right side
    12,891.21x = 70,719,433.20
  5. Step 5: Solve for x
    x = 70,719,433.20/12,891.21
  6. Step 6: Final answer
    x = 5,485.86

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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.