Home / 20,933.01-28,889.42-11,978.73

Finding the Fourth Proportional to 20,933.01, 28,889.42 and 11,978.73

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Solution

The fourth proportional to 20,933.01, 28,889.42 and 11,978.73 is: 16,531.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,933.01 : 28,889.42 = 11,978.73 : x
  2. Step 2: Convert to fraction form
    20,933.01/28,889.42 = 11,978.73/x
  3. Step 3: Cross multiply
    20,933.01x = 28,889.42 × 11,978.73
  4. Step 4: Simplify right side
    20,933.01x = 346,058,502.14
  5. Step 5: Solve for x
    x = 346,058,502.14/20,933.01
  6. Step 6: Final answer
    x = 16,531.71

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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.