Home / 20,996.72-28,975.47-11,565.28

Finding the Fourth Proportional to 20,996.72, 28,975.47 and 11,565.28

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Solution

The fourth proportional to 20,996.72, 28,975.47 and 11,565.28 is: 15,960.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,996.72 : 28,975.47 = 11,565.28 : x
  2. Step 2: Convert to fraction form
    20,996.72/28,975.47 = 11,565.28/x
  3. Step 3: Cross multiply
    20,996.72x = 28,975.47 × 11,565.28
  4. Step 4: Simplify right side
    20,996.72x = 335,109,481.59
  5. Step 5: Solve for x
    x = 335,109,481.59/20,996.72
  6. Step 6: Final answer
    x = 15,960.09

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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.