Home / 3,808.40-5,255.48-2,129.81

Finding the Fourth Proportional to 3,808.40, 5,255.48 and 2,129.81

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Solution

The fourth proportional to 3,808.40, 5,255.48 and 2,129.81 is: 2,939.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,808.40 : 5,255.48 = 2,129.81 : x
  2. Step 2: Convert to fraction form
    3,808.40/5,255.48 = 2,129.81/x
  3. Step 3: Cross multiply
    3,808.40x = 5,255.48 × 2,129.81
  4. Step 4: Simplify right side
    3,808.40x = 11,193,173.86
  5. Step 5: Solve for x
    x = 11,193,173.86/3,808.40
  6. Step 6: Final answer
    x = 2,939.08

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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.