Home / 5,421.24-8,125.30-3,879

Finding the Fourth Proportional to 5,421.24, 8,125.30 and 3,879

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Solution

The fourth proportional to 5,421.24, 8,125.30 and 3,879 is: 5,813.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.24 : 8,125.30 = 3,879 : x
  2. Step 2: Convert to fraction form
    5,421.24/8,125.30 = 3,879/x
  3. Step 3: Cross multiply
    5,421.24x = 8,125.30 × 3,879
  4. Step 4: Simplify right side
    5,421.24x = 31,518,038.70
  5. Step 5: Solve for x
    x = 31,518,038.70/5,421.24
  6. Step 6: Final answer
    x = 5,813.81

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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.