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Finding the Fourth Proportional to 18,672.17, 25,754.79 and 11,112.67

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Solution

The fourth proportional to 18,672.17, 25,754.79 and 11,112.67 is: 15,327.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.17 : 25,754.79 = 11,112.67 : x
  2. Step 2: Convert to fraction form
    18,672.17/25,754.79 = 11,112.67/x
  3. Step 3: Cross multiply
    18,672.17x = 25,754.79 × 11,112.67
  4. Step 4: Simplify right side
    18,672.17x = 286,204,389.86
  5. Step 5: Solve for x
    x = 286,204,389.86/18,672.17
  6. Step 6: Final answer
    x = 15,327.86

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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.