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Finding the Fourth Proportional to 22,170.70, 30,599.94 and 13,213.72

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Solution

The fourth proportional to 22,170.70, 30,599.94 and 13,213.72 is: 18,237.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,170.70 : 30,599.94 = 13,213.72 : x
  2. Step 2: Convert to fraction form
    22,170.70/30,599.94 = 13,213.72/x
  3. Step 3: Cross multiply
    22,170.70x = 30,599.94 × 13,213.72
  4. Step 4: Simplify right side
    22,170.70x = 404,339,039.18
  5. Step 5: Solve for x
    x = 404,339,039.18/22,170.70
  6. Step 6: Final answer
    x = 18,237.54

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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.