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Finding the Fourth Proportional to 13,957.92, 20,939.88 and 7,382.52

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Solution

The fourth proportional to 13,957.92, 20,939.88 and 7,382.52 is: 11,075.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,957.92 : 20,939.88 = 7,382.52 : x
  2. Step 2: Convert to fraction form
    13,957.92/20,939.88 = 7,382.52/x
  3. Step 3: Cross multiply
    13,957.92x = 20,939.88 × 7,382.52
  4. Step 4: Simplify right side
    13,957.92x = 154,589,082.90
  5. Step 5: Solve for x
    x = 154,589,082.90/13,957.92
  6. Step 6: Final answer
    x = 11,075.37

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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.