Home / 21,563.21-29,757.17-12,131.78

Finding the Fourth Proportional to 21,563.21, 29,757.17 and 12,131.78

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Solution

The fourth proportional to 21,563.21, 29,757.17 and 12,131.78 is: 16,741.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,563.21 : 29,757.17 = 12,131.78 : x
  2. Step 2: Convert to fraction form
    21,563.21/29,757.17 = 12,131.78/x
  3. Step 3: Cross multiply
    21,563.21x = 29,757.17 × 12,131.78
  4. Step 4: Simplify right side
    21,563.21x = 361,007,321.41
  5. Step 5: Solve for x
    x = 361,007,321.41/21,563.21
  6. Step 6: Final answer
    x = 16,741.82

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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.