Home / 4,102.72-5,651.60-2,980.40

Finding the Fourth Proportional to 4,102.72, 5,651.60 and 2,980.40

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Solution

The fourth proportional to 4,102.72, 5,651.60 and 2,980.40 is: 4,105.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,102.72 : 5,651.60 = 2,980.40 : x
  2. Step 2: Convert to fraction form
    4,102.72/5,651.60 = 2,980.40/x
  3. Step 3: Cross multiply
    4,102.72x = 5,651.60 × 2,980.40
  4. Step 4: Simplify right side
    4,102.72x = 16,844,028.64
  5. Step 5: Solve for x
    x = 16,844,028.64/4,102.72
  6. Step 6: Final answer
    x = 4,105.58

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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.