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Finding the Fourth Proportional to 18,758.92, 28,145.94 and 7,075.48

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Solution

The fourth proportional to 18,758.92, 28,145.94 and 7,075.48 is: 10,616.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758.92 : 28,145.94 = 7,075.48 : x
  2. Step 2: Convert to fraction form
    18,758.92/28,145.94 = 7,075.48/x
  3. Step 3: Cross multiply
    18,758.92x = 28,145.94 × 7,075.48
  4. Step 4: Simplify right side
    18,758.92x = 199,146,035.55
  5. Step 5: Solve for x
    x = 199,146,035.55/18,758.92
  6. Step 6: Final answer
    x = 10,616.07

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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.