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Finding the Fourth Proportional to 18,791.52, 25,924.80 and 12,813.60

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Solution

The fourth proportional to 18,791.52, 25,924.80 and 12,813.60 is: 17,677.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,791.52 : 25,924.80 = 12,813.60 : x
  2. Step 2: Convert to fraction form
    18,791.52/25,924.80 = 12,813.60/x
  3. Step 3: Cross multiply
    18,791.52x = 25,924.80 × 12,813.60
  4. Step 4: Simplify right side
    18,791.52x = 332,190,017.28
  5. Step 5: Solve for x
    x = 332,190,017.28/18,791.52
  6. Step 6: Final answer
    x = 17,677.66

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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.