Home / 21,172.30-29,215.82-11,739.04

Finding the Fourth Proportional to 21,172.30, 29,215.82 and 11,739.04

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Solution

The fourth proportional to 21,172.30, 29,215.82 and 11,739.04 is: 16,198.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.30 : 29,215.82 = 11,739.04 : x
  2. Step 2: Convert to fraction form
    21,172.30/29,215.82 = 11,739.04/x
  3. Step 3: Cross multiply
    21,172.30x = 29,215.82 × 11,739.04
  4. Step 4: Simplify right side
    21,172.30x = 342,965,679.61
  5. Step 5: Solve for x
    x = 342,965,679.61/21,172.30
  6. Step 6: Final answer
    x = 16,198.79

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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.