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Finding the Fourth Proportional to 21,893.63, 30,213.92 and 11,957.63

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Solution

The fourth proportional to 21,893.63, 30,213.92 and 11,957.63 is: 16,501.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,893.63 : 30,213.92 = 11,957.63 : x
  2. Step 2: Convert to fraction form
    21,893.63/30,213.92 = 11,957.63/x
  3. Step 3: Cross multiply
    21,893.63x = 30,213.92 × 11,957.63
  4. Step 4: Simplify right side
    21,893.63x = 361,286,755.03
  5. Step 5: Solve for x
    x = 361,286,755.03/21,893.63
  6. Step 6: Final answer
    x = 16,501.92

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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.