Home / 21,111-31,645.53-11,755.29

Finding the Fourth Proportional to 21,111, 31,645.53 and 11,755.29

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Solution

The fourth proportional to 21,111, 31,645.53 and 11,755.29 is: 17,621.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,111 : 31,645.53 = 11,755.29 : x
  2. Step 2: Convert to fraction form
    21,111/31,645.53 = 11,755.29/x
  3. Step 3: Cross multiply
    21,111x = 31,645.53 × 11,755.29
  4. Step 4: Simplify right side
    21,111x = 372,002,382.35
  5. Step 5: Solve for x
    x = 372,002,382.35/21,111
  6. Step 6: Final answer
    x = 17,621.26

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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.