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Finding the Fourth Proportional to 12,658.99, 18,984.54 and 9,137.92

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Solution

The fourth proportional to 12,658.99, 18,984.54 and 9,137.92 is: 13,704.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,658.99 : 18,984.54 = 9,137.92 : x
  2. Step 2: Convert to fraction form
    12,658.99/18,984.54 = 9,137.92/x
  3. Step 3: Cross multiply
    12,658.99x = 18,984.54 × 9,137.92
  4. Step 4: Simplify right side
    12,658.99x = 173,479,207.76
  5. Step 5: Solve for x
    x = 173,479,207.76/12,658.99
  6. Step 6: Final answer
    x = 13,704.03

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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.