Home / 21,408.12-29,538.36-13,447.44

Finding the Fourth Proportional to 21,408.12, 29,538.36 and 13,447.44

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Solution

The fourth proportional to 21,408.12, 29,538.36 and 13,447.44 is: 18,554.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,408.12 : 29,538.36 = 13,447.44 : x
  2. Step 2: Convert to fraction form
    21,408.12/29,538.36 = 13,447.44/x
  3. Step 3: Cross multiply
    21,408.12x = 29,538.36 × 13,447.44
  4. Step 4: Simplify right side
    21,408.12x = 397,215,323.80
  5. Step 5: Solve for x
    x = 397,215,323.80/21,408.12
  6. Step 6: Final answer
    x = 18,554.42

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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.