Home / 11,918.20-16,409.72-10,121.92

Finding the Fourth Proportional to 11,918.20, 16,409.72 and 10,121.92

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Solution

The fourth proportional to 11,918.20, 16,409.72 and 10,121.92 is: 13,936.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,918.20 : 16,409.72 = 10,121.92 : x
  2. Step 2: Convert to fraction form
    11,918.20/16,409.72 = 10,121.92/x
  3. Step 3: Cross multiply
    11,918.20x = 16,409.72 × 10,121.92
  4. Step 4: Simplify right side
    11,918.20x = 166,097,873.06
  5. Step 5: Solve for x
    x = 166,097,873.06/11,918.20
  6. Step 6: Final answer
    x = 13,936.49

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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.