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Finding the Fourth Proportional to 28,456.15, 42,676.15 and 8,464.84

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Solution

The fourth proportional to 28,456.15, 42,676.15 and 8,464.84 is: 12,694.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,456.15 : 42,676.15 = 8,464.84 : x
  2. Step 2: Convert to fraction form
    28,456.15/42,676.15 = 8,464.84/x
  3. Step 3: Cross multiply
    28,456.15x = 42,676.15 × 8,464.84
  4. Step 4: Simplify right side
    28,456.15x = 361,246,781.57
  5. Step 5: Solve for x
    x = 361,246,781.57/28,456.15
  6. Step 6: Final answer
    x = 12,694.86

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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.