Home / 21,408.36-29,542.32-11,847.75

Finding the Fourth Proportional to 21,408.36, 29,542.32 and 11,847.75

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Solution

The fourth proportional to 21,408.36, 29,542.32 and 11,847.75 is: 16,349.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,408.36 : 29,542.32 = 11,847.75 : x
  2. Step 2: Convert to fraction form
    21,408.36/29,542.32 = 11,847.75/x
  3. Step 3: Cross multiply
    21,408.36x = 29,542.32 × 11,847.75
  4. Step 4: Simplify right side
    21,408.36x = 350,010,021.78
  5. Step 5: Solve for x
    x = 350,010,021.78/21,408.36
  6. Step 6: Final answer
    x = 16,349.22

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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.