Home / 12,390.44-17,093.09-7,911.95

Finding the Fourth Proportional to 12,390.44, 17,093.09 and 7,911.95

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Solution

The fourth proportional to 12,390.44, 17,093.09 and 7,911.95 is: 10,914.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.44 : 17,093.09 = 7,911.95 : x
  2. Step 2: Convert to fraction form
    12,390.44/17,093.09 = 7,911.95/x
  3. Step 3: Cross multiply
    12,390.44x = 17,093.09 × 7,911.95
  4. Step 4: Simplify right side
    12,390.44x = 135,239,548.40
  5. Step 5: Solve for x
    x = 135,239,548.40/12,390.44
  6. Step 6: Final answer
    x = 10,914.83

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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.