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Finding the Fourth Proportional to 28,173.70, 42,255.15 and 8,452.90

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Solution

The fourth proportional to 28,173.70, 42,255.15 and 8,452.90 is: 12,677.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,173.70 : 42,255.15 = 8,452.90 : x
  2. Step 2: Convert to fraction form
    28,173.70/42,255.15 = 8,452.90/x
  3. Step 3: Cross multiply
    28,173.70x = 42,255.15 × 8,452.90
  4. Step 4: Simplify right side
    28,173.70x = 357,178,557.44
  5. Step 5: Solve for x
    x = 357,178,557.44/28,173.70
  6. Step 6: Final answer
    x = 12,677.73

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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.