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Finding the Fourth Proportional to 19,149.87, 26,421.04 and 11,190.56

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Solution

The fourth proportional to 19,149.87, 26,421.04 and 11,190.56 is: 15,439.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,149.87 : 26,421.04 = 11,190.56 : x
  2. Step 2: Convert to fraction form
    19,149.87/26,421.04 = 11,190.56/x
  3. Step 3: Cross multiply
    19,149.87x = 26,421.04 × 11,190.56
  4. Step 4: Simplify right side
    19,149.87x = 295,666,233.38
  5. Step 5: Solve for x
    x = 295,666,233.38/19,149.87
  6. Step 6: Final answer
    x = 15,439.59

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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.