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Finding the Fourth Proportional to 18,929.97, 28,395.77 and 7,082.64

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Solution

The fourth proportional to 18,929.97, 28,395.77 and 7,082.64 is: 10,624.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,929.97 : 28,395.77 = 7,082.64 : x
  2. Step 2: Convert to fraction form
    18,929.97/28,395.77 = 7,082.64/x
  3. Step 3: Cross multiply
    18,929.97x = 28,395.77 × 7,082.64
  4. Step 4: Simplify right side
    18,929.97x = 201,116,981.02
  5. Step 5: Solve for x
    x = 201,116,981.02/18,929.97
  6. Step 6: Final answer
    x = 10,624.26

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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.