Home / 21,791.14-30,078.12-14,238.62

Finding the Fourth Proportional to 21,791.14, 30,078.12 and 14,238.62

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Solution

The fourth proportional to 21,791.14, 30,078.12 and 14,238.62 is: 19,653.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,791.14 : 30,078.12 = 14,238.62 : x
  2. Step 2: Convert to fraction form
    21,791.14/30,078.12 = 14,238.62/x
  3. Step 3: Cross multiply
    21,791.14x = 30,078.12 × 14,238.62
  4. Step 4: Simplify right side
    21,791.14x = 428,270,920.99
  5. Step 5: Solve for x
    x = 428,270,920.99/21,791.14
  6. Step 6: Final answer
    x = 19,653.44

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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.