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Finding the Fourth Proportional to 19,203.92, 28,805.92 and 7,515.60

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Solution

The fourth proportional to 19,203.92, 28,805.92 and 7,515.60 is: 11,273.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,203.92 : 28,805.92 = 7,515.60 : x
  2. Step 2: Convert to fraction form
    19,203.92/28,805.92 = 7,515.60/x
  3. Step 3: Cross multiply
    19,203.92x = 28,805.92 × 7,515.60
  4. Step 4: Simplify right side
    19,203.92x = 216,493,772.35
  5. Step 5: Solve for x
    x = 216,493,772.35/19,203.92
  6. Step 6: Final answer
    x = 11,273.42

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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.