Home / 20,996.97-28,975.89-11,565.51

Finding the Fourth Proportional to 20,996.97, 28,975.89 and 11,565.51

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Solution

The fourth proportional to 20,996.97, 28,975.89 and 11,565.51 is: 15,960.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,996.97 : 28,975.89 = 11,565.51 : x
  2. Step 2: Convert to fraction form
    20,996.97/28,975.89 = 11,565.51/x
  3. Step 3: Cross multiply
    20,996.97x = 28,975.89 × 11,565.51
  4. Step 4: Simplify right side
    20,996.97x = 335,120,945.55
  5. Step 5: Solve for x
    x = 335,120,945.55/20,996.97
  6. Step 6: Final answer
    x = 15,960.44

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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.