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Finding the Fourth Proportional to 18,321.22, 25,282.80 and 10,144.54

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Solution

The fourth proportional to 18,321.22, 25,282.80 and 10,144.54 is: 13,999.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,321.22 : 25,282.80 = 10,144.54 : x
  2. Step 2: Convert to fraction form
    18,321.22/25,282.80 = 10,144.54/x
  3. Step 3: Cross multiply
    18,321.22x = 25,282.80 × 10,144.54
  4. Step 4: Simplify right side
    18,321.22x = 256,482,375.91
  5. Step 5: Solve for x
    x = 256,482,375.91/18,321.22
  6. Step 6: Final answer
    x = 13,999.20

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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.