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Finding the Fourth Proportional to 18,757.70, 28,126.17 and 7,672.18

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Solution

The fourth proportional to 18,757.70, 28,126.17 and 7,672.18 is: 11,504.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,757.70 : 28,126.17 = 7,672.18 : x
  2. Step 2: Convert to fraction form
    18,757.70/28,126.17 = 7,672.18/x
  3. Step 3: Cross multiply
    18,757.70x = 28,126.17 × 7,672.18
  4. Step 4: Simplify right side
    18,757.70x = 215,788,909.50
  5. Step 5: Solve for x
    x = 215,788,909.50/18,757.70
  6. Step 6: Final answer
    x = 11,504.02

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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.