Home / 5,222.21-7,829.20-2,587.90

Finding the Fourth Proportional to 5,222.21, 7,829.20 and 2,587.90

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Solution

The fourth proportional to 5,222.21, 7,829.20 and 2,587.90 is: 3,879.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,222.21 : 7,829.20 = 2,587.90 : x
  2. Step 2: Convert to fraction form
    5,222.21/7,829.20 = 2,587.90/x
  3. Step 3: Cross multiply
    5,222.21x = 7,829.20 × 2,587.90
  4. Step 4: Simplify right side
    5,222.21x = 20,261,177.74
  5. Step 5: Solve for x
    x = 20,261,177.74/5,222.21
  6. Step 6: Final answer
    x = 3,879.81

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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.