Home / 21,310.88-29,407.80-11,879.12

Finding the Fourth Proportional to 21,310.88, 29,407.80 and 11,879.12

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Solution

The fourth proportional to 21,310.88, 29,407.80 and 11,879.12 is: 16,392.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,310.88 : 29,407.80 = 11,879.12 : x
  2. Step 2: Convert to fraction form
    21,310.88/29,407.80 = 11,879.12/x
  3. Step 3: Cross multiply
    21,310.88x = 29,407.80 × 11,879.12
  4. Step 4: Simplify right side
    21,310.88x = 349,338,785.14
  5. Step 5: Solve for x
    x = 349,338,785.14/21,310.88
  6. Step 6: Final answer
    x = 16,392.51

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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.