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Finding the Fourth Proportional to 19,305, 28,957.50 and 5,454.36

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Solution

The fourth proportional to 19,305, 28,957.50 and 5,454.36 is: 8,181.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,305 : 28,957.50 = 5,454.36 : x
  2. Step 2: Convert to fraction form
    19,305/28,957.50 = 5,454.36/x
  3. Step 3: Cross multiply
    19,305x = 28,957.50 × 5,454.36
  4. Step 4: Simplify right side
    19,305x = 157,944,629.70
  5. Step 5: Solve for x
    x = 157,944,629.70/19,305
  6. Step 6: Final answer
    x = 8,181.54

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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.