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Finding the Fourth Proportional to 19,110.30, 28,656.09 and 7,863.60

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Solution

The fourth proportional to 19,110.30, 28,656.09 and 7,863.60 is: 11,791.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,110.30 : 28,656.09 = 7,863.60 : x
  2. Step 2: Convert to fraction form
    19,110.30/28,656.09 = 7,863.60/x
  3. Step 3: Cross multiply
    19,110.30x = 28,656.09 × 7,863.60
  4. Step 4: Simplify right side
    19,110.30x = 225,340,029.32
  5. Step 5: Solve for x
    x = 225,340,029.32/19,110.30
  6. Step 6: Final answer
    x = 11,791.55

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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.