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Finding the Fourth Proportional to 18,771.14, 28,156.61 and 7,531.52

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Solution

The fourth proportional to 18,771.14, 28,156.61 and 7,531.52 is: 11,297.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,771.14 : 28,156.61 = 7,531.52 : x
  2. Step 2: Convert to fraction form
    18,771.14/28,156.61 = 7,531.52/x
  3. Step 3: Cross multiply
    18,771.14x = 28,156.61 × 7,531.52
  4. Step 4: Simplify right side
    18,771.14x = 212,061,949.39
  5. Step 5: Solve for x
    x = 212,061,949.39/18,771.14
  6. Step 6: Final answer
    x = 11,297.23

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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.