Home / 30,530.31-42,110.79-21,474.88

Finding the Fourth Proportional to 30,530.31, 42,110.79 and 21,474.88

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Solution

The fourth proportional to 30,530.31, 42,110.79 and 21,474.88 is: 29,620.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,530.31 : 42,110.79 = 21,474.88 : x
  2. Step 2: Convert to fraction form
    30,530.31/42,110.79 = 21,474.88/x
  3. Step 3: Cross multiply
    30,530.31x = 42,110.79 × 21,474.88
  4. Step 4: Simplify right side
    30,530.31x = 904,324,161.96
  5. Step 5: Solve for x
    x = 904,324,161.96/30,530.31
  6. Step 6: Final answer
    x = 29,620.54

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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.