Home / 21,839.58-30,131.01-13,339.44

Finding the Fourth Proportional to 21,839.58, 30,131.01 and 13,339.44

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Solution

The fourth proportional to 21,839.58, 30,131.01 and 13,339.44 is: 18,403.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,839.58 : 30,131.01 = 13,339.44 : x
  2. Step 2: Convert to fraction form
    21,839.58/30,131.01 = 13,339.44/x
  3. Step 3: Cross multiply
    21,839.58x = 30,131.01 × 13,339.44
  4. Step 4: Simplify right side
    21,839.58x = 401,930,800.03
  5. Step 5: Solve for x
    x = 401,930,800.03/21,839.58
  6. Step 6: Final answer
    x = 18,403.78

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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.