Home / 19,932.30-27,505.80-11,978.90

Finding the Fourth Proportional to 19,932.30, 27,505.80 and 11,978.90

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Solution

The fourth proportional to 19,932.30, 27,505.80 and 11,978.90 is: 16,530.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,932.30 : 27,505.80 = 11,978.90 : x
  2. Step 2: Convert to fraction form
    19,932.30/27,505.80 = 11,978.90/x
  3. Step 3: Cross multiply
    19,932.30x = 27,505.80 × 11,978.90
  4. Step 4: Simplify right side
    19,932.30x = 329,489,227.62
  5. Step 5: Solve for x
    x = 329,489,227.62/19,932.30
  6. Step 6: Final answer
    x = 16,530.42

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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.