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Finding the Fourth Proportional to 21,930.96, 30,265.48 and 11,994.96

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Solution

The fourth proportional to 21,930.96, 30,265.48 and 11,994.96 is: 16,553.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,930.96 : 30,265.48 = 11,994.96 : x
  2. Step 2: Convert to fraction form
    21,930.96/30,265.48 = 11,994.96/x
  3. Step 3: Cross multiply
    21,930.96x = 30,265.48 × 11,994.96
  4. Step 4: Simplify right side
    21,930.96x = 363,033,221.98
  5. Step 5: Solve for x
    x = 363,033,221.98/21,930.96
  6. Step 6: Final answer
    x = 16,553.46

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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.