Home / 21,310.90-29,409.41-11,879.46

Finding the Fourth Proportional to 21,310.90, 29,409.41 and 11,879.46

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Solution

The fourth proportional to 21,310.90, 29,409.41 and 11,879.46 is: 16,393.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,310.90 : 29,409.41 = 11,879.46 : x
  2. Step 2: Convert to fraction form
    21,310.90/29,409.41 = 11,879.46/x
  3. Step 3: Cross multiply
    21,310.90x = 29,409.41 × 11,879.46
  4. Step 4: Simplify right side
    21,310.90x = 349,367,939.42
  5. Step 5: Solve for x
    x = 349,367,939.42/21,310.90
  6. Step 6: Final answer
    x = 16,393.86

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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.