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Finding the Fourth Proportional to 18,222.12, 25,128.90 and 16,252.20

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Solution

The fourth proportional to 18,222.12, 25,128.90 and 16,252.20 is: 22,412.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,222.12 : 25,128.90 = 16,252.20 : x
  2. Step 2: Convert to fraction form
    18,222.12/25,128.90 = 16,252.20/x
  3. Step 3: Cross multiply
    18,222.12x = 25,128.90 × 16,252.20
  4. Step 4: Simplify right side
    18,222.12x = 408,399,908.58
  5. Step 5: Solve for x
    x = 408,399,908.58/18,222.12
  6. Step 6: Final answer
    x = 22,412.32

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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.