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Finding the Fourth Proportional to 18,757.44, 28,142.91 and 8,770.95

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Solution

The fourth proportional to 18,757.44, 28,142.91 and 8,770.95 is: 13,159.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,757.44 : 28,142.91 = 8,770.95 : x
  2. Step 2: Convert to fraction form
    18,757.44/28,142.91 = 8,770.95/x
  3. Step 3: Cross multiply
    18,757.44x = 28,142.91 × 8,770.95
  4. Step 4: Simplify right side
    18,757.44x = 246,840,056.46
  5. Step 5: Solve for x
    x = 246,840,056.46/18,757.44
  6. Step 6: Final answer
    x = 13,159.58

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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.