Home / 14,121.80-21,192.30-8,272.20

Finding the Fourth Proportional to 14,121.80, 21,192.30 and 8,272.20

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Solution

The fourth proportional to 14,121.80, 21,192.30 and 8,272.20 is: 12,413.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,121.80 : 21,192.30 = 8,272.20 : x
  2. Step 2: Convert to fraction form
    14,121.80/21,192.30 = 8,272.20/x
  3. Step 3: Cross multiply
    14,121.80x = 21,192.30 × 8,272.20
  4. Step 4: Simplify right side
    14,121.80x = 175,306,944.06
  5. Step 5: Solve for x
    x = 175,306,944.06/14,121.80
  6. Step 6: Final answer
    x = 12,413.92

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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.