Home / 21,104.70-31,629.35-15,531.96

Finding the Fourth Proportional to 21,104.70, 31,629.35 and 15,531.96

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Solution

The fourth proportional to 21,104.70, 31,629.35 and 15,531.96 is: 23,277.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,104.70 : 31,629.35 = 15,531.96 : x
  2. Step 2: Convert to fraction form
    21,104.70/31,629.35 = 15,531.96/x
  3. Step 3: Cross multiply
    21,104.70x = 31,629.35 × 15,531.96
  4. Step 4: Simplify right side
    21,104.70x = 491,265,721.37
  5. Step 5: Solve for x
    x = 491,265,721.37/21,104.70
  6. Step 6: Final answer
    x = 23,277.55

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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.