Home / 21,902.12-30,227.30-13,409.96

Finding the Fourth Proportional to 21,902.12, 30,227.30 and 13,409.96

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Solution

The fourth proportional to 21,902.12, 30,227.30 and 13,409.96 is: 18,507.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,902.12 : 30,227.30 = 13,409.96 : x
  2. Step 2: Convert to fraction form
    21,902.12/30,227.30 = 13,409.96/x
  3. Step 3: Cross multiply
    21,902.12x = 30,227.30 × 13,409.96
  4. Step 4: Simplify right side
    21,902.12x = 405,346,665.72
  5. Step 5: Solve for x
    x = 405,346,665.72/21,902.12
  6. Step 6: Final answer
    x = 18,507.19

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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.