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Finding the Fourth Proportional to 8,471.88, 12,705.53 and 3,540.50

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Solution

The fourth proportional to 8,471.88, 12,705.53 and 3,540.50 is: 5,309.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,471.88 : 12,705.53 = 3,540.50 : x
  2. Step 2: Convert to fraction form
    8,471.88/12,705.53 = 3,540.50/x
  3. Step 3: Cross multiply
    8,471.88x = 12,705.53 × 3,540.50
  4. Step 4: Simplify right side
    8,471.88x = 44,983,847.73
  5. Step 5: Solve for x
    x = 44,983,847.73/8,471.88
  6. Step 6: Final answer
    x = 5,309.78

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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.