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Finding the Fourth Proportional to 18,805, 28,207.50 and 4,954

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Solution

The fourth proportional to 18,805, 28,207.50 and 4,954 is: 7,431

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,805 : 28,207.50 = 4,954 : x
  2. Step 2: Convert to fraction form
    18,805/28,207.50 = 4,954/x
  3. Step 3: Cross multiply
    18,805x = 28,207.50 × 4,954
  4. Step 4: Simplify right side
    18,805x = 139,739,955
  5. Step 5: Solve for x
    x = 139,739,955/18,805
  6. Step 6: Final answer
    x = 7,431

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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.