Home / 21,902.05-30,225.20-12,951.09

Finding the Fourth Proportional to 21,902.05, 30,225.20 and 12,951.09

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Solution

The fourth proportional to 21,902.05, 30,225.20 and 12,951.09 is: 17,872.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,902.05 : 30,225.20 = 12,951.09 : x
  2. Step 2: Convert to fraction form
    21,902.05/30,225.20 = 12,951.09/x
  3. Step 3: Cross multiply
    21,902.05x = 30,225.20 × 12,951.09
  4. Step 4: Simplify right side
    21,902.05x = 391,449,293.56
  5. Step 5: Solve for x
    x = 391,449,293.56/21,902.05
  6. Step 6: Final answer
    x = 17,872.73

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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.