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Finding the Fourth Proportional to 21,671.52, 29,906.80 and 11,735.52

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Solution

The fourth proportional to 21,671.52, 29,906.80 and 11,735.52 is: 16,195.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,671.52 : 29,906.80 = 11,735.52 : x
  2. Step 2: Convert to fraction form
    21,671.52/29,906.80 = 11,735.52/x
  3. Step 3: Cross multiply
    21,671.52x = 29,906.80 × 11,735.52
  4. Step 4: Simplify right side
    21,671.52x = 350,971,849.54
  5. Step 5: Solve for x
    x = 350,971,849.54/21,671.52
  6. Step 6: Final answer
    x = 16,195.07

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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.