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Finding the Fourth Proportional to 33,138.40, 49,642.80 and 19,951.60

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Solution

The fourth proportional to 33,138.40, 49,642.80 and 19,951.60 is: 29,888.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,138.40 : 49,642.80 = 19,951.60 : x
  2. Step 2: Convert to fraction form
    33,138.40/49,642.80 = 19,951.60/x
  3. Step 3: Cross multiply
    33,138.40x = 49,642.80 × 19,951.60
  4. Step 4: Simplify right side
    33,138.40x = 990,453,288.48
  5. Step 5: Solve for x
    x = 990,453,288.48/33,138.40
  6. Step 6: Final answer
    x = 29,888.39

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1.5x scale

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.