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Finding the Fourth Proportional to 22,121.88, 30,528.19 and 12,185.88

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Solution

The fourth proportional to 22,121.88, 30,528.19 and 12,185.88 is: 16,816.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,121.88 : 30,528.19 = 12,185.88 : x
  2. Step 2: Convert to fraction form
    22,121.88/30,528.19 = 12,185.88/x
  3. Step 3: Cross multiply
    22,121.88x = 30,528.19 × 12,185.88
  4. Step 4: Simplify right side
    22,121.88x = 372,012,859.96
  5. Step 5: Solve for x
    x = 372,012,859.96/22,121.88
  6. Step 6: Final answer
    x = 16,816.51

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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.