Home / 21,161.30-29,205.32-13,899.60

Finding the Fourth Proportional to 21,161.30, 29,205.32 and 13,899.60

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Solution

The fourth proportional to 21,161.30, 29,205.32 and 13,899.60 is: 19,183.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.30 : 29,205.32 = 13,899.60 : x
  2. Step 2: Convert to fraction form
    21,161.30/29,205.32 = 13,899.60/x
  3. Step 3: Cross multiply
    21,161.30x = 29,205.32 × 13,899.60
  4. Step 4: Simplify right side
    21,161.30x = 405,942,196.37
  5. Step 5: Solve for x
    x = 405,942,196.37/21,161.30
  6. Step 6: Final answer
    x = 19,183.24

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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.