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Finding the Fourth Proportional to 21,932, 30,266.80 and 11,996.64

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Solution

The fourth proportional to 21,932, 30,266.80 and 11,996.64 is: 16,555.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,932 : 30,266.80 = 11,996.64 : x
  2. Step 2: Convert to fraction form
    21,932/30,266.80 = 11,996.64/x
  3. Step 3: Cross multiply
    21,932x = 30,266.80 × 11,996.64
  4. Step 4: Simplify right side
    21,932x = 363,099,903.55
  5. Step 5: Solve for x
    x = 363,099,903.55/21,932
  6. Step 6: Final answer
    x = 16,555.71

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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.