Home / 3,942.10-5,439.85-2,173.72

Finding the Fourth Proportional to 3,942.10, 5,439.85 and 2,173.72

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Solution

The fourth proportional to 3,942.10, 5,439.85 and 2,173.72 is: 2,999.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,942.10 : 5,439.85 = 2,173.72 : x
  2. Step 2: Convert to fraction form
    3,942.10/5,439.85 = 2,173.72/x
  3. Step 3: Cross multiply
    3,942.10x = 5,439.85 × 2,173.72
  4. Step 4: Simplify right side
    3,942.10x = 11,824,710.74
  5. Step 5: Solve for x
    x = 11,824,710.74/3,942.10
  6. Step 6: Final answer
    x = 2,999.60

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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.