Home / 3,890.86-5,369.26-2,122.50

Finding the Fourth Proportional to 3,890.86, 5,369.26 and 2,122.50

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Solution

The fourth proportional to 3,890.86, 5,369.26 and 2,122.50 is: 2,928.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.86 : 5,369.26 = 2,122.50 : x
  2. Step 2: Convert to fraction form
    3,890.86/5,369.26 = 2,122.50/x
  3. Step 3: Cross multiply
    3,890.86x = 5,369.26 × 2,122.50
  4. Step 4: Simplify right side
    3,890.86x = 11,396,254.35
  5. Step 5: Solve for x
    x = 11,396,254.35/3,890.86
  6. Step 6: Final answer
    x = 2,928.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.