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Finding the Fourth Proportional to 18,595.55, 25,654.43 and 11,879.43

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Solution

The fourth proportional to 18,595.55, 25,654.43 and 11,879.43 is: 16,388.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,595.55 : 25,654.43 = 11,879.43 : x
  2. Step 2: Convert to fraction form
    18,595.55/25,654.43 = 11,879.43/x
  3. Step 3: Cross multiply
    18,595.55x = 25,654.43 × 11,879.43
  4. Step 4: Simplify right side
    18,595.55x = 304,759,945.98
  5. Step 5: Solve for x
    x = 304,759,945.98/18,595.55
  6. Step 6: Final answer
    x = 16,388.87

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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.