Home / 8,120.75-12,181.74-4,609.40

Finding the Fourth Proportional to 8,120.75, 12,181.74 and 4,609.40

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Solution

The fourth proportional to 8,120.75, 12,181.74 and 4,609.40 is: 6,914.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120.75 : 12,181.74 = 4,609.40 : x
  2. Step 2: Convert to fraction form
    8,120.75/12,181.74 = 4,609.40/x
  3. Step 3: Cross multiply
    8,120.75x = 12,181.74 × 4,609.40
  4. Step 4: Simplify right side
    8,120.75x = 56,150,489.31
  5. Step 5: Solve for x
    x = 56,150,489.31/8,120.75
  6. Step 6: Final answer
    x = 6,914.45

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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.