Home / 12,621.75-18,932.99-3,387.75

Finding the Fourth Proportional to 12,621.75, 18,932.99 and 3,387.75

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Solution

The fourth proportional to 12,621.75, 18,932.99 and 3,387.75 is: 5,081.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,621.75 : 18,932.99 = 3,387.75 : x
  2. Step 2: Convert to fraction form
    12,621.75/18,932.99 = 3,387.75/x
  3. Step 3: Cross multiply
    12,621.75x = 18,932.99 × 3,387.75
  4. Step 4: Simplify right side
    12,621.75x = 64,140,219.93
  5. Step 5: Solve for x
    x = 64,140,219.93/12,621.75
  6. Step 6: Final answer
    x = 5,081.72

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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.