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Finding the Fourth Proportional to 28,319.15, 42,478.92 and 8,597.94

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Solution

The fourth proportional to 28,319.15, 42,478.92 and 8,597.94 is: 12,896.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,319.15 : 42,478.92 = 8,597.94 : x
  2. Step 2: Convert to fraction form
    28,319.15/42,478.92 = 8,597.94/x
  3. Step 3: Cross multiply
    28,319.15x = 42,478.92 × 8,597.94
  4. Step 4: Simplify right side
    28,319.15x = 365,231,205.42
  5. Step 5: Solve for x
    x = 365,231,205.42/28,319.15
  6. Step 6: Final answer
    x = 12,896.97

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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.