Home / 20,881.27-28,816.73-11,930.23

Finding the Fourth Proportional to 20,881.27, 28,816.73 and 11,930.23

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Solution

The fourth proportional to 20,881.27, 28,816.73 and 11,930.23 is: 16,464.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.27 : 28,816.73 = 11,930.23 : x
  2. Step 2: Convert to fraction form
    20,881.27/28,816.73 = 11,930.23/x
  3. Step 3: Cross multiply
    20,881.27x = 28,816.73 × 11,930.23
  4. Step 4: Simplify right side
    20,881.27x = 343,790,216.75
  5. Step 5: Solve for x
    x = 343,790,216.75/20,881.27
  6. Step 6: Final answer
    x = 16,464.05

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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.