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Finding the Fourth Proportional to 18,706.10, 28,066.44 and 8,310.56

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Solution

The fourth proportional to 18,706.10, 28,066.44 and 8,310.56 is: 12,469.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,706.10 : 28,066.44 = 8,310.56 : x
  2. Step 2: Convert to fraction form
    18,706.10/28,066.44 = 8,310.56/x
  3. Step 3: Cross multiply
    18,706.10x = 28,066.44 × 8,310.56
  4. Step 4: Simplify right side
    18,706.10x = 233,247,833.61
  5. Step 5: Solve for x
    x = 233,247,833.61/18,706.10
  6. Step 6: Final answer
    x = 12,469.08

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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.