Home / 21,161.43-29,202.12-11,964.20

Finding the Fourth Proportional to 21,161.43, 29,202.12 and 11,964.20

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Solution

The fourth proportional to 21,161.43, 29,202.12 and 11,964.20 is: 16,510.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.43 : 29,202.12 = 11,964.20 : x
  2. Step 2: Convert to fraction form
    21,161.43/29,202.12 = 11,964.20/x
  3. Step 3: Cross multiply
    21,161.43x = 29,202.12 × 11,964.20
  4. Step 4: Simplify right side
    21,161.43x = 349,379,858.09
  5. Step 5: Solve for x
    x = 349,379,858.09/21,161.43
  6. Step 6: Final answer
    x = 16,510.22

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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.