Home / 21,111.06-31,645.80-11,755.56

Finding the Fourth Proportional to 21,111.06, 31,645.80 and 11,755.56

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Solution

The fourth proportional to 21,111.06, 31,645.80 and 11,755.56 is: 17,621.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,111.06 : 31,645.80 = 11,755.56 : x
  2. Step 2: Convert to fraction form
    21,111.06/31,645.80 = 11,755.56/x
  3. Step 3: Cross multiply
    21,111.06x = 31,645.80 × 11,755.56
  4. Step 4: Simplify right side
    21,111.06x = 372,014,100.65
  5. Step 5: Solve for x
    x = 372,014,100.65/21,111.06
  6. Step 6: Final answer
    x = 17,621.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.