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Finding the Fourth Proportional to 18,619.44, 25,694.65 and 13,860.67

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Solution

The fourth proportional to 18,619.44, 25,694.65 and 13,860.67 is: 19,127.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,619.44 : 25,694.65 = 13,860.67 : x
  2. Step 2: Convert to fraction form
    18,619.44/25,694.65 = 13,860.67/x
  3. Step 3: Cross multiply
    18,619.44x = 25,694.65 × 13,860.67
  4. Step 4: Simplify right side
    18,619.44x = 356,145,065.68
  5. Step 5: Solve for x
    x = 356,145,065.68/18,619.44
  6. Step 6: Final answer
    x = 19,127.59

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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.