Home / 21,945.69-30,285-11,874

Finding the Fourth Proportional to 21,945.69, 30,285 and 11,874

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Solution

The fourth proportional to 21,945.69, 30,285 and 11,874 is: 16,386.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,945.69 : 30,285 = 11,874 : x
  2. Step 2: Convert to fraction form
    21,945.69/30,285 = 11,874/x
  3. Step 3: Cross multiply
    21,945.69x = 30,285 × 11,874
  4. Step 4: Simplify right side
    21,945.69x = 359,604,090
  5. Step 5: Solve for x
    x = 359,604,090/21,945.69
  6. Step 6: Final answer
    x = 16,386.09

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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.