Home / 20,996.37-28,972.35-11,565.54

Finding the Fourth Proportional to 20,996.37, 28,972.35 and 11,565.54

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Solution

The fourth proportional to 20,996.37, 28,972.35 and 11,565.54 is: 15,958.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,996.37 : 28,972.35 = 11,565.54 : x
  2. Step 2: Convert to fraction form
    20,996.37/28,972.35 = 11,565.54/x
  3. Step 3: Cross multiply
    20,996.37x = 28,972.35 × 11,565.54
  4. Step 4: Simplify right side
    20,996.37x = 335,080,872.82
  5. Step 5: Solve for x
    x = 335,080,872.82/20,996.37
  6. Step 6: Final answer
    x = 15,958.99

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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.