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Finding the Fourth Proportional to 18,959.16, 28,433.28 and 7,269.68

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Solution

The fourth proportional to 18,959.16, 28,433.28 and 7,269.68 is: 10,902.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,959.16 : 28,433.28 = 7,269.68 : x
  2. Step 2: Convert to fraction form
    18,959.16/28,433.28 = 7,269.68/x
  3. Step 3: Cross multiply
    18,959.16x = 28,433.28 × 7,269.68
  4. Step 4: Simplify right side
    18,959.16x = 206,700,846.95
  5. Step 5: Solve for x
    x = 206,700,846.95/18,959.16
  6. Step 6: Final answer
    x = 10,902.43

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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.