Home / 21,310.43-29,408.78-11,877.98

Finding the Fourth Proportional to 21,310.43, 29,408.78 and 11,877.98

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Solution

The fourth proportional to 21,310.43, 29,408.78 and 11,877.98 is: 16,391.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,310.43 : 29,408.78 = 11,877.98 : x
  2. Step 2: Convert to fraction form
    21,310.43/29,408.78 = 11,877.98/x
  3. Step 3: Cross multiply
    21,310.43x = 29,408.78 × 11,877.98
  4. Step 4: Simplify right side
    21,310.43x = 349,316,900.66
  5. Step 5: Solve for x
    x = 349,316,900.66/21,310.43
  6. Step 6: Final answer
    x = 16,391.83

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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.