Home / 21,286.49-31,958.01-18,186.42

Finding the Fourth Proportional to 21,286.49, 31,958.01 and 18,186.42

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Solution

The fourth proportional to 21,286.49, 31,958.01 and 18,186.42 is: 27,303.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,286.49 : 31,958.01 = 18,186.42 : x
  2. Step 2: Convert to fraction form
    21,286.49/31,958.01 = 18,186.42/x
  3. Step 3: Cross multiply
    21,286.49x = 31,958.01 × 18,186.42
  4. Step 4: Simplify right side
    21,286.49x = 581,201,792.22
  5. Step 5: Solve for x
    x = 581,201,792.22/21,286.49
  6. Step 6: Final answer
    x = 27,303.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.