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Finding the Fourth Proportional to 33,019.80, 49,551.30 and 18,979.80

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Solution

The fourth proportional to 33,019.80, 49,551.30 and 18,979.80 is: 28,482.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,019.80 : 49,551.30 = 18,979.80 : x
  2. Step 2: Convert to fraction form
    33,019.80/49,551.30 = 18,979.80/x
  3. Step 3: Cross multiply
    33,019.80x = 49,551.30 × 18,979.80
  4. Step 4: Simplify right side
    33,019.80x = 940,473,763.74
  5. Step 5: Solve for x
    x = 940,473,763.74/33,019.80
  6. Step 6: Final answer
    x = 28,482.12

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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.