Home / 19,390.82-29,028.80-11,971.41

Finding the Fourth Proportional to 19,390.82, 29,028.80 and 11,971.41

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Solution

The fourth proportional to 19,390.82, 29,028.80 and 11,971.41 is: 17,921.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,390.82 : 29,028.80 = 11,971.41 : x
  2. Step 2: Convert to fraction form
    19,390.82/29,028.80 = 11,971.41/x
  3. Step 3: Cross multiply
    19,390.82x = 29,028.80 × 11,971.41
  4. Step 4: Simplify right side
    19,390.82x = 347,515,606.75
  5. Step 5: Solve for x
    x = 347,515,606.75/19,390.82
  6. Step 6: Final answer
    x = 17,921.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.