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Finding the Fourth Proportional to 19,672.88, 29,505.22 and 7,198.78

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Solution

The fourth proportional to 19,672.88, 29,505.22 and 7,198.78 is: 10,796.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,672.88 : 29,505.22 = 7,198.78 : x
  2. Step 2: Convert to fraction form
    19,672.88/29,505.22 = 7,198.78/x
  3. Step 3: Cross multiply
    19,672.88x = 29,505.22 × 7,198.78
  4. Step 4: Simplify right side
    19,672.88x = 212,401,587.63
  5. Step 5: Solve for x
    x = 212,401,587.63/19,672.88
  6. Step 6: Final answer
    x = 10,796.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.