Home / 20,992.09-28,947.31-16,212.81

Finding the Fourth Proportional to 20,992.09, 28,947.31 and 16,212.81

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Solution

The fourth proportional to 20,992.09, 28,947.31 and 16,212.81 is: 22,356.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.09 : 28,947.31 = 16,212.81 : x
  2. Step 2: Convert to fraction form
    20,992.09/28,947.31 = 16,212.81/x
  3. Step 3: Cross multiply
    20,992.09x = 28,947.31 × 16,212.81
  4. Step 4: Simplify right side
    20,992.09x = 469,317,237.04
  5. Step 5: Solve for x
    x = 469,317,237.04/20,992.09
  6. Step 6: Final answer
    x = 22,356.86

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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.