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Finding the Fourth Proportional to 18,755.57, 28,133.36 and 7,660.33

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Solution

The fourth proportional to 18,755.57, 28,133.36 and 7,660.33 is: 11,490.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,755.57 : 28,133.36 = 7,660.33 : x
  2. Step 2: Convert to fraction form
    18,755.57/28,133.36 = 7,660.33/x
  3. Step 3: Cross multiply
    18,755.57x = 28,133.36 × 7,660.33
  4. Step 4: Simplify right side
    18,755.57x = 215,510,821.61
  5. Step 5: Solve for x
    x = 215,510,821.61/18,755.57
  6. Step 6: Final answer
    x = 11,490.50

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Similar ratio
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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.