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Finding the Fourth Proportional to 19,874.67, 27,421.05 and 11,913.99

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Solution

The fourth proportional to 19,874.67, 27,421.05 and 11,913.99 is: 16,437.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,874.67 : 27,421.05 = 11,913.99 : x
  2. Step 2: Convert to fraction form
    19,874.67/27,421.05 = 11,913.99/x
  3. Step 3: Cross multiply
    19,874.67x = 27,421.05 × 11,913.99
  4. Step 4: Simplify right side
    19,874.67x = 326,694,115.49
  5. Step 5: Solve for x
    x = 326,694,115.49/19,874.67
  6. Step 6: Final answer
    x = 16,437.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.