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Finding the Fourth Proportional to 18,384.87, 25,372.09 and 13,900.92

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Solution

The fourth proportional to 18,384.87, 25,372.09 and 13,900.92 is: 19,183.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,384.87 : 25,372.09 = 13,900.92 : x
  2. Step 2: Convert to fraction form
    18,384.87/25,372.09 = 13,900.92/x
  3. Step 3: Cross multiply
    18,384.87x = 25,372.09 × 13,900.92
  4. Step 4: Simplify right side
    18,384.87x = 352,695,237.36
  5. Step 5: Solve for x
    x = 352,695,237.36/18,384.87
  6. Step 6: Final answer
    x = 19,183.99

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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.