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Finding the Fourth Proportional to 18,371.56, 25,390.08 and 13,893.88

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Solution

The fourth proportional to 18,371.56, 25,390.08 and 13,893.88 is: 19,201.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,371.56 : 25,390.08 = 13,893.88 : x
  2. Step 2: Convert to fraction form
    18,371.56/25,390.08 = 13,893.88/x
  3. Step 3: Cross multiply
    18,371.56x = 25,390.08 × 13,893.88
  4. Step 4: Simplify right side
    18,371.56x = 352,766,724.71
  5. Step 5: Solve for x
    x = 352,766,724.71/18,371.56
  6. Step 6: Final answer
    x = 19,201.78

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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.