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Finding the Fourth Proportional to 18,782.64, 28,179.90 and 11,294.82

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Solution

The fourth proportional to 18,782.64, 28,179.90 and 11,294.82 is: 16,945.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,782.64 : 28,179.90 = 11,294.82 : x
  2. Step 2: Convert to fraction form
    18,782.64/28,179.90 = 11,294.82/x
  3. Step 3: Cross multiply
    18,782.64x = 28,179.90 × 11,294.82
  4. Step 4: Simplify right side
    18,782.64x = 318,286,898.12
  5. Step 5: Solve for x
    x = 318,286,898.12/18,782.64
  6. Step 6: Final answer
    x = 16,945.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.