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Finding the Fourth Proportional to 12,235.65, 18,354.18 and 3,469.88

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Solution

The fourth proportional to 12,235.65, 18,354.18 and 3,469.88 is: 5,205.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,235.65 : 18,354.18 = 3,469.88 : x
  2. Step 2: Convert to fraction form
    12,235.65/18,354.18 = 3,469.88/x
  3. Step 3: Cross multiply
    12,235.65x = 18,354.18 × 3,469.88
  4. Step 4: Simplify right side
    12,235.65x = 63,686,710.33
  5. Step 5: Solve for x
    x = 63,686,710.33/12,235.65
  6. Step 6: Final answer
    x = 5,205.01

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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.