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Finding the Fourth Proportional to 18,758.65, 28,127.59 and 7,673.12

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Solution

The fourth proportional to 18,758.65, 28,127.59 and 7,673.12 is: 11,505.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758.65 : 28,127.59 = 7,673.12 : x
  2. Step 2: Convert to fraction form
    18,758.65/28,127.59 = 7,673.12/x
  3. Step 3: Cross multiply
    18,758.65x = 28,127.59 × 7,673.12
  4. Step 4: Simplify right side
    18,758.65x = 215,826,370.17
  5. Step 5: Solve for x
    x = 215,826,370.17/18,758.65
  6. Step 6: Final answer
    x = 11,505.43

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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.