Home / 5,211.81-7,820.49-3,135.99

Finding the Fourth Proportional to 5,211.81, 7,820.49 and 3,135.99

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Solution

The fourth proportional to 5,211.81, 7,820.49 and 3,135.99 is: 4,705.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,211.81 : 7,820.49 = 3,135.99 : x
  2. Step 2: Convert to fraction form
    5,211.81/7,820.49 = 3,135.99/x
  3. Step 3: Cross multiply
    5,211.81x = 7,820.49 × 3,135.99
  4. Step 4: Simplify right side
    5,211.81x = 24,524,978.44
  5. Step 5: Solve for x
    x = 24,524,978.44/5,211.81
  6. Step 6: Final answer
    x = 4,705.65

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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.