Home / 8,120.80-12,181.20-4,609.45

Finding the Fourth Proportional to 8,120.80, 12,181.20 and 4,609.45

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Solution

The fourth proportional to 8,120.80, 12,181.20 and 4,609.45 is: 6,914.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120.80 : 12,181.20 = 4,609.45 : x
  2. Step 2: Convert to fraction form
    8,120.80/12,181.20 = 4,609.45/x
  3. Step 3: Cross multiply
    8,120.80x = 12,181.20 × 4,609.45
  4. Step 4: Simplify right side
    8,120.80x = 56,148,632.34
  5. Step 5: Solve for x
    x = 56,148,632.34/8,120.80
  6. Step 6: Final answer
    x = 6,914.18

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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.