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Finding the Fourth Proportional to 28,474.56, 42,711.84 and 8,752.86

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Solution

The fourth proportional to 28,474.56, 42,711.84 and 8,752.86 is: 13,129.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,474.56 : 42,711.84 = 8,752.86 : x
  2. Step 2: Convert to fraction form
    28,474.56/42,711.84 = 8,752.86/x
  3. Step 3: Cross multiply
    28,474.56x = 42,711.84 × 8,752.86
  4. Step 4: Simplify right side
    28,474.56x = 373,850,755.86
  5. Step 5: Solve for x
    x = 373,850,755.86/28,474.56
  6. Step 6: Final answer
    x = 13,129.29

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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.