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Finding the Fourth Proportional to 18,751.08, 28,126.62 and 7,655.82

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Solution

The fourth proportional to 18,751.08, 28,126.62 and 7,655.82 is: 11,483.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.08 : 28,126.62 = 7,655.82 : x
  2. Step 2: Convert to fraction form
    18,751.08/28,126.62 = 7,655.82/x
  3. Step 3: Cross multiply
    18,751.08x = 28,126.62 × 7,655.82
  4. Step 4: Simplify right side
    18,751.08x = 215,332,339.93
  5. Step 5: Solve for x
    x = 215,332,339.93/18,751.08
  6. Step 6: Final answer
    x = 11,483.73

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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.