Home / 3,942.18-5,439.78-2,173.77

Finding the Fourth Proportional to 3,942.18, 5,439.78 and 2,173.77

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Solution

The fourth proportional to 3,942.18, 5,439.78 and 2,173.77 is: 2,999.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,942.18 : 5,439.78 = 2,173.77 : x
  2. Step 2: Convert to fraction form
    3,942.18/5,439.78 = 2,173.77/x
  3. Step 3: Cross multiply
    3,942.18x = 5,439.78 × 2,173.77
  4. Step 4: Simplify right side
    3,942.18x = 11,824,830.57
  5. Step 5: Solve for x
    x = 11,824,830.57/3,942.18
  6. Step 6: Final answer
    x = 2,999.57

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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.