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Finding the Fourth Proportional to 18,796.90, 25,880.67 and 15,958.39

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Solution

The fourth proportional to 18,796.90, 25,880.67 and 15,958.39 is: 21,972.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,796.90 : 25,880.67 = 15,958.39 : x
  2. Step 2: Convert to fraction form
    18,796.90/25,880.67 = 15,958.39/x
  3. Step 3: Cross multiply
    18,796.90x = 25,880.67 × 15,958.39
  4. Step 4: Simplify right side
    18,796.90x = 413,013,825.32
  5. Step 5: Solve for x
    x = 413,013,825.32/18,796.90
  6. Step 6: Final answer
    x = 21,972.44

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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.