Home / 21,190.29-29,244.92-13,540.57

Finding the Fourth Proportional to 21,190.29, 29,244.92 and 13,540.57

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Solution

The fourth proportional to 21,190.29, 29,244.92 and 13,540.57 is: 18,687.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.29 : 29,244.92 = 13,540.57 : x
  2. Step 2: Convert to fraction form
    21,190.29/29,244.92 = 13,540.57/x
  3. Step 3: Cross multiply
    21,190.29x = 29,244.92 × 13,540.57
  4. Step 4: Simplify right side
    21,190.29x = 395,992,745.59
  5. Step 5: Solve for x
    x = 395,992,745.59/21,190.29
  6. Step 6: Final answer
    x = 18,687.46

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1.5x scale

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.