Home / 21,057.82-29,058.30-12,105.28

Finding the Fourth Proportional to 21,057.82, 29,058.30 and 12,105.28

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Solution

The fourth proportional to 21,057.82, 29,058.30 and 12,105.28 is: 16,704.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,057.82 : 29,058.30 = 12,105.28 : x
  2. Step 2: Convert to fraction form
    21,057.82/29,058.30 = 12,105.28/x
  3. Step 3: Cross multiply
    21,057.82x = 29,058.30 × 12,105.28
  4. Step 4: Simplify right side
    21,057.82x = 351,758,857.82
  5. Step 5: Solve for x
    x = 351,758,857.82/21,057.82
  6. Step 6: Final answer
    x = 16,704.43

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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.