Home / 21,150.45-31,738.84-19,179.64

Finding the Fourth Proportional to 21,150.45, 31,738.84 and 19,179.64

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Solution

The fourth proportional to 21,150.45, 31,738.84 and 19,179.64 is: 28,781.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,150.45 : 31,738.84 = 19,179.64 : x
  2. Step 2: Convert to fraction form
    21,150.45/31,738.84 = 19,179.64/x
  3. Step 3: Cross multiply
    21,150.45x = 31,738.84 × 19,179.64
  4. Step 4: Simplify right side
    21,150.45x = 608,739,338.41
  5. Step 5: Solve for x
    x = 608,739,338.41/21,150.45
  6. Step 6: Final answer
    x = 28,781.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.