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Finding the Fourth Proportional to 18,765.62, 28,092.34 and 11,347.64

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Solution

The fourth proportional to 18,765.62, 28,092.34 and 11,347.64 is: 16,987.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,765.62 : 28,092.34 = 11,347.64 : x
  2. Step 2: Convert to fraction form
    18,765.62/28,092.34 = 11,347.64/x
  3. Step 3: Cross multiply
    18,765.62x = 28,092.34 × 11,347.64
  4. Step 4: Simplify right side
    18,765.62x = 318,781,761.08
  5. Step 5: Solve for x
    x = 318,781,761.08/18,765.62
  6. Step 6: Final answer
    x = 16,987.54

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1.5x scale

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.