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Finding the Fourth Proportional to 18,672.56, 25,757.26 and 11,955.76

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Solution

The fourth proportional to 18,672.56, 25,757.26 and 11,955.76 is: 16,491.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.56 : 25,757.26 = 11,955.76 : x
  2. Step 2: Convert to fraction form
    18,672.56/25,757.26 = 11,955.76/x
  3. Step 3: Cross multiply
    18,672.56x = 25,757.26 × 11,955.76
  4. Step 4: Simplify right side
    18,672.56x = 307,947,618.82
  5. Step 5: Solve for x
    x = 307,947,618.82/18,672.56
  6. Step 6: Final answer
    x = 16,491.99

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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.