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Finding the Fourth Proportional to 18,876, 28,317.24 and 5,729.70

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Solution

The fourth proportional to 18,876, 28,317.24 and 5,729.70 is: 8,595.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,876 : 28,317.24 = 5,729.70 : x
  2. Step 2: Convert to fraction form
    18,876/28,317.24 = 5,729.70/x
  3. Step 3: Cross multiply
    18,876x = 28,317.24 × 5,729.70
  4. Step 4: Simplify right side
    18,876x = 162,249,290.03
  5. Step 5: Solve for x
    x = 162,249,290.03/18,876
  6. Step 6: Final answer
    x = 8,595.53

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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.