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Finding the Fourth Proportional to 17,563.72, 26,349.90 and 12,379.72

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Solution

The fourth proportional to 17,563.72, 26,349.90 and 12,379.72 is: 18,572.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,563.72 : 26,349.90 = 12,379.72 : x
  2. Step 2: Convert to fraction form
    17,563.72/26,349.90 = 12,379.72/x
  3. Step 3: Cross multiply
    17,563.72x = 26,349.90 × 12,379.72
  4. Step 4: Simplify right side
    17,563.72x = 326,204,384.03
  5. Step 5: Solve for x
    x = 326,204,384.03/17,563.72
  6. Step 6: Final answer
    x = 18,572.62

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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.