Home / 21,303.53-29,399.22-11,872.09

Finding the Fourth Proportional to 21,303.53, 29,399.22 and 11,872.09

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Solution

The fourth proportional to 21,303.53, 29,399.22 and 11,872.09 is: 16,383.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,303.53 : 29,399.22 = 11,872.09 : x
  2. Step 2: Convert to fraction form
    21,303.53/29,399.22 = 11,872.09/x
  3. Step 3: Cross multiply
    21,303.53x = 29,399.22 × 11,872.09
  4. Step 4: Simplify right side
    21,303.53x = 349,029,979.41
  5. Step 5: Solve for x
    x = 349,029,979.41/21,303.53
  6. Step 6: Final answer
    x = 16,383.67

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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.