Home / 19,738.82-27,231.36-12,930.90

Finding the Fourth Proportional to 19,738.82, 27,231.36 and 12,930.90

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Solution

The fourth proportional to 19,738.82, 27,231.36 and 12,930.90 is: 17,839.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,738.82 : 27,231.36 = 12,930.90 : x
  2. Step 2: Convert to fraction form
    19,738.82/27,231.36 = 12,930.90/x
  3. Step 3: Cross multiply
    19,738.82x = 27,231.36 × 12,930.90
  4. Step 4: Simplify right side
    19,738.82x = 352,125,993.02
  5. Step 5: Solve for x
    x = 352,125,993.02/19,738.82
  6. Step 6: Final answer
    x = 17,839.26

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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.