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Finding the Fourth Proportional to 19,034.87, 28,549.80 and 7,939.49

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Solution

The fourth proportional to 19,034.87, 28,549.80 and 7,939.49 is: 11,908.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,034.87 : 28,549.80 = 7,939.49 : x
  2. Step 2: Convert to fraction form
    19,034.87/28,549.80 = 7,939.49/x
  3. Step 3: Cross multiply
    19,034.87x = 28,549.80 × 7,939.49
  4. Step 4: Simplify right side
    19,034.87x = 226,670,708.85
  5. Step 5: Solve for x
    x = 226,670,708.85/19,034.87
  6. Step 6: Final answer
    x = 11,908.19

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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.