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Finding the Fourth Proportional to 19,791.72, 27,310.50 and 11,293.20

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Solution

The fourth proportional to 19,791.72, 27,310.50 and 11,293.20 is: 15,583.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,791.72 : 27,310.50 = 11,293.20 : x
  2. Step 2: Convert to fraction form
    19,791.72/27,310.50 = 11,293.20/x
  3. Step 3: Cross multiply
    19,791.72x = 27,310.50 × 11,293.20
  4. Step 4: Simplify right side
    19,791.72x = 308,422,938.60
  5. Step 5: Solve for x
    x = 308,422,938.60/19,791.72
  6. Step 6: Final answer
    x = 15,583.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.