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Finding the Fourth Proportional to 13,212.88, 19,799.88 and 7,361.44

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Solution

The fourth proportional to 13,212.88, 19,799.88 and 7,361.44 is: 11,031.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,212.88 : 19,799.88 = 7,361.44 : x
  2. Step 2: Convert to fraction form
    13,212.88/19,799.88 = 7,361.44/x
  3. Step 3: Cross multiply
    13,212.88x = 19,799.88 × 7,361.44
  4. Step 4: Simplify right side
    13,212.88x = 145,755,628.63
  5. Step 5: Solve for x
    x = 145,755,628.63/13,212.88
  6. Step 6: Final answer
    x = 11,031.33

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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.