Home / 3,924.36-5,420.34-3,406.86

Finding the Fourth Proportional to 3,924.36, 5,420.34 and 3,406.86

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Solution

The fourth proportional to 3,924.36, 5,420.34 and 3,406.86 is: 4,705.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,924.36 : 5,420.34 = 3,406.86 : x
  2. Step 2: Convert to fraction form
    3,924.36/5,420.34 = 3,406.86/x
  3. Step 3: Cross multiply
    3,924.36x = 5,420.34 × 3,406.86
  4. Step 4: Simplify right side
    3,924.36x = 18,466,339.53
  5. Step 5: Solve for x
    x = 18,466,339.53/3,924.36
  6. Step 6: Final answer
    x = 4,705.57

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1.5x scale

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.