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Finding the Fourth Proportional to 28,074.92, 42,112.35 and 8,353.43

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Solution

The fourth proportional to 28,074.92, 42,112.35 and 8,353.43 is: 12,530.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,074.92 : 42,112.35 = 8,353.43 : x
  2. Step 2: Convert to fraction form
    28,074.92/42,112.35 = 8,353.43/x
  3. Step 3: Cross multiply
    28,074.92x = 42,112.35 × 8,353.43
  4. Step 4: Simplify right side
    28,074.92x = 351,782,567.86
  5. Step 5: Solve for x
    x = 351,782,567.86/28,074.92
  6. Step 6: Final answer
    x = 12,530.14

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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.