Home / 21,310.77-29,408.90-11,879.13

Finding the Fourth Proportional to 21,310.77, 29,408.90 and 11,879.13

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Solution

The fourth proportional to 21,310.77, 29,408.90 and 11,879.13 is: 16,393.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,310.77 : 29,408.90 = 11,879.13 : x
  2. Step 2: Convert to fraction form
    21,310.77/29,408.90 = 11,879.13/x
  3. Step 3: Cross multiply
    21,310.77x = 29,408.90 × 11,879.13
  4. Step 4: Simplify right side
    21,310.77x = 349,352,086.86
  5. Step 5: Solve for x
    x = 349,352,086.86/21,310.77
  6. Step 6: Final answer
    x = 16,393.22

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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.