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Finding the Fourth Proportional to 18,883.18, 28,324.57 and 7,786.59

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Solution

The fourth proportional to 18,883.18, 28,324.57 and 7,786.59 is: 11,679.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,883.18 : 28,324.57 = 7,786.59 : x
  2. Step 2: Convert to fraction form
    18,883.18/28,324.57 = 7,786.59/x
  3. Step 3: Cross multiply
    18,883.18x = 28,324.57 × 7,786.59
  4. Step 4: Simplify right side
    18,883.18x = 220,551,813.52
  5. Step 5: Solve for x
    x = 220,551,813.52/18,883.18
  6. Step 6: Final answer
    x = 11,679.80

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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.