Home / 21,982.56-30,330.36-13,029.36

Finding the Fourth Proportional to 21,982.56, 30,330.36 and 13,029.36

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Solution

The fourth proportional to 21,982.56, 30,330.36 and 13,029.36 is: 17,977.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,982.56 : 30,330.36 = 13,029.36 : x
  2. Step 2: Convert to fraction form
    21,982.56/30,330.36 = 13,029.36/x
  3. Step 3: Cross multiply
    21,982.56x = 30,330.36 × 13,029.36
  4. Step 4: Simplify right side
    21,982.56x = 395,185,179.37
  5. Step 5: Solve for x
    x = 395,185,179.37/21,982.56
  6. Step 6: Final answer
    x = 17,977.21

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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.