Home / 5,421.80-8,143.62-3,234.80

Finding the Fourth Proportional to 5,421.80, 8,143.62 and 3,234.80

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Solution

The fourth proportional to 5,421.80, 8,143.62 and 3,234.80 is: 4,858.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.80 : 8,143.62 = 3,234.80 : x
  2. Step 2: Convert to fraction form
    5,421.80/8,143.62 = 3,234.80/x
  3. Step 3: Cross multiply
    5,421.80x = 8,143.62 × 3,234.80
  4. Step 4: Simplify right side
    5,421.80x = 26,342,941.26
  5. Step 5: Solve for x
    x = 26,342,941.26/5,421.80
  6. Step 6: Final answer
    x = 4,858.71

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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.