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Finding the Fourth Proportional to 18,704.25, 25,811.87 and 10,320.75

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Solution

The fourth proportional to 18,704.25, 25,811.87 and 10,320.75 is: 14,242.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,704.25 : 25,811.87 = 10,320.75 : x
  2. Step 2: Convert to fraction form
    18,704.25/25,811.87 = 10,320.75/x
  3. Step 3: Cross multiply
    18,704.25x = 25,811.87 × 10,320.75
  4. Step 4: Simplify right side
    18,704.25x = 266,397,805.70
  5. Step 5: Solve for x
    x = 266,397,805.70/18,704.25
  6. Step 6: Final answer
    x = 14,242.64

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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.