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Finding the Fourth Proportional to 18,409.68, 27,672.84 and 15,843.60

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Solution

The fourth proportional to 18,409.68, 27,672.84 and 15,843.60 is: 23,815.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,409.68 : 27,672.84 = 15,843.60 : x
  2. Step 2: Convert to fraction form
    18,409.68/27,672.84 = 15,843.60/x
  3. Step 3: Cross multiply
    18,409.68x = 27,672.84 × 15,843.60
  4. Step 4: Simplify right side
    18,409.68x = 438,437,407.82
  5. Step 5: Solve for x
    x = 438,437,407.82/18,409.68
  6. Step 6: Final answer
    x = 23,815.59

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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.