Home / 21,311.17-29,410.41-11,879.80

Finding the Fourth Proportional to 21,311.17, 29,410.41 and 11,879.80

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Solution

The fourth proportional to 21,311.17, 29,410.41 and 11,879.80 is: 16,394.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.17 : 29,410.41 = 11,879.80 : x
  2. Step 2: Convert to fraction form
    21,311.17/29,410.41 = 11,879.80/x
  3. Step 3: Cross multiply
    21,311.17x = 29,410.41 × 11,879.80
  4. Step 4: Simplify right side
    21,311.17x = 349,389,788.72
  5. Step 5: Solve for x
    x = 349,389,788.72/21,311.17
  6. Step 6: Final answer
    x = 16,394.68

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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.