Home / 7,172.20-9,897.72-4,028.44

Finding the Fourth Proportional to 7,172.20, 9,897.72 and 4,028.44

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Solution

The fourth proportional to 7,172.20, 9,897.72 and 4,028.44 is: 5,559.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,172.20 : 9,897.72 = 4,028.44 : x
  2. Step 2: Convert to fraction form
    7,172.20/9,897.72 = 4,028.44/x
  3. Step 3: Cross multiply
    7,172.20x = 9,897.72 × 4,028.44
  4. Step 4: Simplify right side
    7,172.20x = 39,872,371.16
  5. Step 5: Solve for x
    x = 39,872,371.16/7,172.20
  6. Step 6: Final answer
    x = 5,559.29

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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.