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Finding the Fourth Proportional to 15,546.11, 21,453 and 8,472.38

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Solution

The fourth proportional to 15,546.11, 21,453 and 8,472.38 is: 11,691.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,546.11 : 21,453 = 8,472.38 : x
  2. Step 2: Convert to fraction form
    15,546.11/21,453 = 8,472.38/x
  3. Step 3: Cross multiply
    15,546.11x = 21,453 × 8,472.38
  4. Step 4: Simplify right side
    15,546.11x = 181,757,968.14
  5. Step 5: Solve for x
    x = 181,757,968.14/15,546.11
  6. Step 6: Final answer
    x = 11,691.54

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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.