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Finding the Fourth Proportional to 18,639.11, 27,968.38 and 7,553.99

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Solution

The fourth proportional to 18,639.11, 27,968.38 and 7,553.99 is: 11,334.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,639.11 : 27,968.38 = 7,553.99 : x
  2. Step 2: Convert to fraction form
    18,639.11/27,968.38 = 7,553.99/x
  3. Step 3: Cross multiply
    18,639.11x = 27,968.38 × 7,553.99
  4. Step 4: Simplify right side
    18,639.11x = 211,272,704.11
  5. Step 5: Solve for x
    x = 211,272,704.11/18,639.11
  6. Step 6: Final answer
    x = 11,334.92

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1.5x scale

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.