Home / 21,015.12-28,974.24-13,843.92

Finding the Fourth Proportional to 21,015.12, 28,974.24 and 13,843.92

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Solution

The fourth proportional to 21,015.12, 28,974.24 and 13,843.92 is: 19,087.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015.12 : 28,974.24 = 13,843.92 : x
  2. Step 2: Convert to fraction form
    21,015.12/28,974.24 = 13,843.92/x
  3. Step 3: Cross multiply
    21,015.12x = 28,974.24 × 13,843.92
  4. Step 4: Simplify right side
    21,015.12x = 401,117,060.62
  5. Step 5: Solve for x
    x = 401,117,060.62/21,015.12
  6. Step 6: Final answer
    x = 19,087.07

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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.