Home / 20,939.27-28,893.74-11,986.25

Finding the Fourth Proportional to 20,939.27, 28,893.74 and 11,986.25

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Solution

The fourth proportional to 20,939.27, 28,893.74 and 11,986.25 is: 16,539.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.27 : 28,893.74 = 11,986.25 : x
  2. Step 2: Convert to fraction form
    20,939.27/28,893.74 = 11,986.25/x
  3. Step 3: Cross multiply
    20,939.27x = 28,893.74 × 11,986.25
  4. Step 4: Simplify right side
    20,939.27x = 346,327,386.68
  5. Step 5: Solve for x
    x = 346,327,386.68/20,939.27
  6. Step 6: Final answer
    x = 16,539.62

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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.