Home / 5,478.41-8,218.43-2,191.43

Finding the Fourth Proportional to 5,478.41, 8,218.43 and 2,191.43

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Solution

The fourth proportional to 5,478.41, 8,218.43 and 2,191.43 is: 3,287.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478.41 : 8,218.43 = 2,191.43 : x
  2. Step 2: Convert to fraction form
    5,478.41/8,218.43 = 2,191.43/x
  3. Step 3: Cross multiply
    5,478.41x = 8,218.43 × 2,191.43
  4. Step 4: Simplify right side
    5,478.41x = 18,010,131.86
  5. Step 5: Solve for x
    x = 18,010,131.86/5,478.41
  6. Step 6: Final answer
    x = 3,287.47

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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.