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Finding the Fourth Proportional to 20,235.15, 27,911.79 and 14,481.99

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Solution

The fourth proportional to 20,235.15, 27,911.79 and 14,481.99 is: 19,976.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,235.15 : 27,911.79 = 14,481.99 : x
  2. Step 2: Convert to fraction form
    20,235.15/27,911.79 = 14,481.99/x
  3. Step 3: Cross multiply
    20,235.15x = 27,911.79 × 14,481.99
  4. Step 4: Simplify right side
    20,235.15x = 404,218,263.66
  5. Step 5: Solve for x
    x = 404,218,263.66/20,235.15
  6. Step 6: Final answer
    x = 19,976.04

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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.