Home / 3,898.08-5,379.48-2,129.86

Finding the Fourth Proportional to 3,898.08, 5,379.48 and 2,129.86

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Solution

The fourth proportional to 3,898.08, 5,379.48 and 2,129.86 is: 2,939.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.08 : 5,379.48 = 2,129.86 : x
  2. Step 2: Convert to fraction form
    3,898.08/5,379.48 = 2,129.86/x
  3. Step 3: Cross multiply
    3,898.08x = 5,379.48 × 2,129.86
  4. Step 4: Simplify right side
    3,898.08x = 11,457,539.27
  5. Step 5: Solve for x
    x = 11,457,539.27/3,898.08
  6. Step 6: Final answer
    x = 2,939.28

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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.