Home / 8,121.18-12,181.86-2,856.34

Finding the Fourth Proportional to 8,121.18, 12,181.86 and 2,856.34

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Solution

The fourth proportional to 8,121.18, 12,181.86 and 2,856.34 is: 4,284.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.18 : 12,181.86 = 2,856.34 : x
  2. Step 2: Convert to fraction form
    8,121.18/12,181.86 = 2,856.34/x
  3. Step 3: Cross multiply
    8,121.18x = 12,181.86 × 2,856.34
  4. Step 4: Simplify right side
    8,121.18x = 34,795,519.71
  5. Step 5: Solve for x
    x = 34,795,519.71/8,121.18
  6. Step 6: Final answer
    x = 4,284.54

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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.