Home / 12,128.20-16,735.98-6,821.96

Finding the Fourth Proportional to 12,128.20, 16,735.98 and 6,821.96

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Solution

The fourth proportional to 12,128.20, 16,735.98 and 6,821.96 is: 9,413.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.20 : 16,735.98 = 6,821.96 : x
  2. Step 2: Convert to fraction form
    12,128.20/16,735.98 = 6,821.96/x
  3. Step 3: Cross multiply
    12,128.20x = 16,735.98 × 6,821.96
  4. Step 4: Simplify right side
    12,128.20x = 114,172,186.12
  5. Step 5: Solve for x
    x = 114,172,186.12/12,128.20
  6. Step 6: Final answer
    x = 9,413.78

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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.