Home / 7,172.80-9,897.91-4,028.38

Finding the Fourth Proportional to 7,172.80, 9,897.91 and 4,028.38

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Solution

The fourth proportional to 7,172.80, 9,897.91 and 4,028.38 is: 5,558.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,172.80 : 9,897.91 = 4,028.38 : x
  2. Step 2: Convert to fraction form
    7,172.80/9,897.91 = 4,028.38/x
  3. Step 3: Cross multiply
    7,172.80x = 9,897.91 × 4,028.38
  4. Step 4: Simplify right side
    7,172.80x = 39,872,542.69
  5. Step 5: Solve for x
    x = 39,872,542.69/7,172.80
  6. Step 6: Final answer
    x = 5,558.85

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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.