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Finding the Fourth Proportional to 18,628.92, 27,918.60 and 13,675.32

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Solution

The fourth proportional to 18,628.92, 27,918.60 and 13,675.32 is: 20,494.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,628.92 : 27,918.60 = 13,675.32 : x
  2. Step 2: Convert to fraction form
    18,628.92/27,918.60 = 13,675.32/x
  3. Step 3: Cross multiply
    18,628.92x = 27,918.60 × 13,675.32
  4. Step 4: Simplify right side
    18,628.92x = 381,795,788.95
  5. Step 5: Solve for x
    x = 381,795,788.95/18,628.92
  6. Step 6: Final answer
    x = 20,494.79

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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.