Home / 20,932.42-28,887.42-11,979.22

Finding the Fourth Proportional to 20,932.42, 28,887.42 and 11,979.22

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Solution

The fourth proportional to 20,932.42, 28,887.42 and 11,979.22 is: 16,531.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,932.42 : 28,887.42 = 11,979.22 : x
  2. Step 2: Convert to fraction form
    20,932.42/28,887.42 = 11,979.22/x
  3. Step 3: Cross multiply
    20,932.42x = 28,887.42 × 11,979.22
  4. Step 4: Simplify right side
    20,932.42x = 346,048,759.41
  5. Step 5: Solve for x
    x = 346,048,759.41/20,932.42
  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.