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Finding the Fourth Proportional to 28,245.60, 38,982.39 and 16,308.92

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Solution

The fourth proportional to 28,245.60, 38,982.39 and 16,308.92 is: 22,508.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,245.60 : 38,982.39 = 16,308.92 : x
  2. Step 2: Convert to fraction form
    28,245.60/38,982.39 = 16,308.92/x
  3. Step 3: Cross multiply
    28,245.60x = 38,982.39 × 16,308.92
  4. Step 4: Simplify right side
    28,245.60x = 635,760,679.92
  5. Step 5: Solve for x
    x = 635,760,679.92/28,245.60
  6. Step 6: Final answer
    x = 22,508.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.