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Finding the Fourth Proportional to 18,719.84, 25,839.09 and 11,551.94

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Solution

The fourth proportional to 18,719.84, 25,839.09 and 11,551.94 is: 15,945.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.84 : 25,839.09 = 11,551.94 : x
  2. Step 2: Convert to fraction form
    18,719.84/25,839.09 = 11,551.94/x
  3. Step 3: Cross multiply
    18,719.84x = 25,839.09 × 11,551.94
  4. Step 4: Simplify right side
    18,719.84x = 298,491,488.14
  5. Step 5: Solve for x
    x = 298,491,488.14/18,719.84
  6. Step 6: Final answer
    x = 15,945.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.