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Finding the Fourth Proportional to 13,672.09, 18,867.54 and 7,930.68

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Solution

The fourth proportional to 13,672.09, 18,867.54 and 7,930.68 is: 10,944.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,672.09 : 18,867.54 = 7,930.68 : x
  2. Step 2: Convert to fraction form
    13,672.09/18,867.54 = 7,930.68/x
  3. Step 3: Cross multiply
    13,672.09x = 18,867.54 × 7,930.68
  4. Step 4: Simplify right side
    13,672.09x = 149,632,288.14
  5. Step 5: Solve for x
    x = 149,632,288.14/13,672.09
  6. Step 6: Final answer
    x = 10,944.36

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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.