Home / 8,121.55-12,180.96-2,860.47

Finding the Fourth Proportional to 8,121.55, 12,180.96 and 2,860.47

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Solution

The fourth proportional to 8,121.55, 12,180.96 and 2,860.47 is: 4,290.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.55 : 12,180.96 = 2,860.47 : x
  2. Step 2: Convert to fraction form
    8,121.55/12,180.96 = 2,860.47/x
  3. Step 3: Cross multiply
    8,121.55x = 12,180.96 × 2,860.47
  4. Step 4: Simplify right side
    8,121.55x = 34,843,270.65
  5. Step 5: Solve for x
    x = 34,843,270.65/8,121.55
  6. Step 6: Final answer
    x = 4,290.22

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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.