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Finding the Fourth Proportional to 18,771.66, 25,904.61 and 10,813.95

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Solution

The fourth proportional to 18,771.66, 25,904.61 and 10,813.95 is: 14,923.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,771.66 : 25,904.61 = 10,813.95 : x
  2. Step 2: Convert to fraction form
    18,771.66/25,904.61 = 10,813.95/x
  3. Step 3: Cross multiply
    18,771.66x = 25,904.61 × 10,813.95
  4. Step 4: Simplify right side
    18,771.66x = 280,131,157.31
  5. Step 5: Solve for x
    x = 280,131,157.31/18,771.66
  6. Step 6: Final answer
    x = 14,923.09

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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.