Home / 5,618.78-8,421.33-3,975.80

Finding the Fourth Proportional to 5,618.78, 8,421.33 and 3,975.80

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Solution

The fourth proportional to 5,618.78, 8,421.33 and 3,975.80 is: 5,958.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,618.78 : 8,421.33 = 3,975.80 : x
  2. Step 2: Convert to fraction form
    5,618.78/8,421.33 = 3,975.80/x
  3. Step 3: Cross multiply
    5,618.78x = 8,421.33 × 3,975.80
  4. Step 4: Simplify right side
    5,618.78x = 33,481,523.81
  5. Step 5: Solve for x
    x = 33,481,523.81/5,618.78
  6. Step 6: Final answer
    x = 5,958.86

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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.