Home / 8,277.20-12,415.78-2,121.20

Finding the Fourth Proportional to 8,277.20, 12,415.78 and 2,121.20

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Solution

The fourth proportional to 8,277.20, 12,415.78 and 2,121.20 is: 3,181.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,277.20 : 12,415.78 = 2,121.20 : x
  2. Step 2: Convert to fraction form
    8,277.20/12,415.78 = 2,121.20/x
  3. Step 3: Cross multiply
    8,277.20x = 12,415.78 × 2,121.20
  4. Step 4: Simplify right side
    8,277.20x = 26,336,352.54
  5. Step 5: Solve for x
    x = 26,336,352.54/8,277.20
  6. Step 6: Final answer
    x = 3,181.79

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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.