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Finding the Fourth Proportional to 18,805.53, 28,207.89 and 4,954.53

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Solution

The fourth proportional to 18,805.53, 28,207.89 and 4,954.53 is: 7,431.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,805.53 : 28,207.89 = 4,954.53 : x
  2. Step 2: Convert to fraction form
    18,805.53/28,207.89 = 4,954.53/x
  3. Step 3: Cross multiply
    18,805.53x = 28,207.89 × 4,954.53
  4. Step 4: Simplify right side
    18,805.53x = 139,756,837.24
  5. Step 5: Solve for x
    x = 139,756,837.24/18,805.53
  6. Step 6: Final answer
    x = 7,431.69

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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.