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Finding the Fourth Proportional to 12,349.89, 18,524.81 and 3,115.89

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Solution

The fourth proportional to 12,349.89, 18,524.81 and 3,115.89 is: 4,673.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,349.89 : 18,524.81 = 3,115.89 : x
  2. Step 2: Convert to fraction form
    12,349.89/18,524.81 = 3,115.89/x
  3. Step 3: Cross multiply
    12,349.89x = 18,524.81 × 3,115.89
  4. Step 4: Simplify right side
    12,349.89x = 57,721,254.65
  5. Step 5: Solve for x
    x = 57,721,254.65/12,349.89
  6. Step 6: Final answer
    x = 4,673.83

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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.