Home / 21,238.67-31,862.09-11,388.96

Finding the Fourth Proportional to 21,238.67, 31,862.09 and 11,388.96

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Solution

The fourth proportional to 21,238.67, 31,862.09 and 11,388.96 is: 17,085.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,238.67 : 31,862.09 = 11,388.96 : x
  2. Step 2: Convert to fraction form
    21,238.67/31,862.09 = 11,388.96/x
  3. Step 3: Cross multiply
    21,238.67x = 31,862.09 × 11,388.96
  4. Step 4: Simplify right side
    21,238.67x = 362,876,097.00
  5. Step 5: Solve for x
    x = 362,876,097.00/21,238.67
  6. Step 6: Final answer
    x = 17,085.63

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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.