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Finding the Fourth Proportional to 19,305.75, 28,963.50 and 5,454.75

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Solution

The fourth proportional to 19,305.75, 28,963.50 and 5,454.75 is: 8,183.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,305.75 : 28,963.50 = 5,454.75 : x
  2. Step 2: Convert to fraction form
    19,305.75/28,963.50 = 5,454.75/x
  3. Step 3: Cross multiply
    19,305.75x = 28,963.50 × 5,454.75
  4. Step 4: Simplify right side
    19,305.75x = 157,988,651.63
  5. Step 5: Solve for x
    x = 157,988,651.63/19,305.75
  6. Step 6: Final answer
    x = 8,183.50

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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.