Home / 5,415.37-8,123.67-2,128.03

Finding the Fourth Proportional to 5,415.37, 8,123.67 and 2,128.03

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Solution

The fourth proportional to 5,415.37, 8,123.67 and 2,128.03 is: 3,192.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.37 : 8,123.67 = 2,128.03 : x
  2. Step 2: Convert to fraction form
    5,415.37/8,123.67 = 2,128.03/x
  3. Step 3: Cross multiply
    5,415.37x = 8,123.67 × 2,128.03
  4. Step 4: Simplify right side
    5,415.37x = 17,287,413.47
  5. Step 5: Solve for x
    x = 17,287,413.47/5,415.37
  6. Step 6: Final answer
    x = 3,192.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.