Home / 21,939.84-30,279.96-13,447.02

Finding the Fourth Proportional to 21,939.84, 30,279.96 and 13,447.02

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Solution

The fourth proportional to 21,939.84, 30,279.96 and 13,447.02 is: 18,558.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,939.84 : 30,279.96 = 13,447.02 : x
  2. Step 2: Convert to fraction form
    21,939.84/30,279.96 = 13,447.02/x
  3. Step 3: Cross multiply
    21,939.84x = 30,279.96 × 13,447.02
  4. Step 4: Simplify right side
    21,939.84x = 407,175,227.72
  5. Step 5: Solve for x
    x = 407,175,227.72/21,939.84
  6. Step 6: Final answer
    x = 18,558.71

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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.