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Finding the Fourth Proportional to 18,503.42, 27,735.69 and 12,658.46

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Solution

The fourth proportional to 18,503.42, 27,735.69 and 12,658.46 is: 18,974.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,503.42 : 27,735.69 = 12,658.46 : x
  2. Step 2: Convert to fraction form
    18,503.42/27,735.69 = 12,658.46/x
  3. Step 3: Cross multiply
    18,503.42x = 27,735.69 × 12,658.46
  4. Step 4: Simplify right side
    18,503.42x = 351,091,122.44
  5. Step 5: Solve for x
    x = 351,091,122.44/18,503.42
  6. Step 6: Final answer
    x = 18,974.39

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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.