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Finding the Fourth Proportional to 13,392.69, 18,481.41 and 7,424.22

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Solution

The fourth proportional to 13,392.69, 18,481.41 and 7,424.22 is: 10,245.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,392.69 : 18,481.41 = 7,424.22 : x
  2. Step 2: Convert to fraction form
    13,392.69/18,481.41 = 7,424.22/x
  3. Step 3: Cross multiply
    13,392.69x = 18,481.41 × 7,424.22
  4. Step 4: Simplify right side
    13,392.69x = 137,210,053.75
  5. Step 5: Solve for x
    x = 137,210,053.75/13,392.69
  6. Step 6: Final answer
    x = 10,245.15

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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.