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Finding the Fourth Proportional to 28,517.45, 42,778.45 and 8,525.48

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Solution

The fourth proportional to 28,517.45, 42,778.45 and 8,525.48 is: 12,788.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,517.45 : 42,778.45 = 8,525.48 : x
  2. Step 2: Convert to fraction form
    28,517.45/42,778.45 = 8,525.48/x
  3. Step 3: Cross multiply
    28,517.45x = 42,778.45 × 8,525.48
  4. Step 4: Simplify right side
    28,517.45x = 364,706,616.67
  5. Step 5: Solve for x
    x = 364,706,616.67/28,517.45
  6. Step 6: Final answer
    x = 12,788.90

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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.