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Finding the Fourth Proportional to 18,758.82, 28,098.54 and 12,165.42

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Solution

The fourth proportional to 18,758.82, 28,098.54 and 12,165.42 is: 18,222.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758.82 : 28,098.54 = 12,165.42 : x
  2. Step 2: Convert to fraction form
    18,758.82/28,098.54 = 12,165.42/x
  3. Step 3: Cross multiply
    18,758.82x = 28,098.54 × 12,165.42
  4. Step 4: Simplify right side
    18,758.82x = 341,830,540.49
  5. Step 5: Solve for x
    x = 341,830,540.49/18,758.82
  6. Step 6: Final answer
    x = 18,222.39

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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.