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Finding the Fourth Proportional to 18,777.69, 25,912.99 and 10,279.71

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Solution

The fourth proportional to 18,777.69, 25,912.99 and 10,279.71 is: 14,185.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,777.69 : 25,912.99 = 10,279.71 : x
  2. Step 2: Convert to fraction form
    18,777.69/25,912.99 = 10,279.71/x
  3. Step 3: Cross multiply
    18,777.69x = 25,912.99 × 10,279.71
  4. Step 4: Simplify right side
    18,777.69x = 266,378,022.43
  5. Step 5: Solve for x
    x = 266,378,022.43/18,777.69
  6. Step 6: Final answer
    x = 14,185.88

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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.