Home / 5,172.80-7,137.92-3,076.64

Finding the Fourth Proportional to 5,172.80, 7,137.92 and 3,076.64

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Solution

The fourth proportional to 5,172.80, 7,137.92 and 3,076.64 is: 4,245.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.80 : 7,137.92 = 3,076.64 : x
  2. Step 2: Convert to fraction form
    5,172.80/7,137.92 = 3,076.64/x
  3. Step 3: Cross multiply
    5,172.80x = 7,137.92 × 3,076.64
  4. Step 4: Simplify right side
    5,172.80x = 21,960,810.19
  5. Step 5: Solve for x
    x = 21,960,810.19/5,172.80
  6. Step 6: Final answer
    x = 4,245.44

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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.