Home / 20,996.70-28,974.75-11,565.24

Finding the Fourth Proportional to 20,996.70, 28,974.75 and 11,565.24

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Solution

The fourth proportional to 20,996.70, 28,974.75 and 11,565.24 is: 15,959.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,996.70 : 28,974.75 = 11,565.24 : x
  2. Step 2: Convert to fraction form
    20,996.70/28,974.75 = 11,565.24/x
  3. Step 3: Cross multiply
    20,996.70x = 28,974.75 × 11,565.24
  4. Step 4: Simplify right side
    20,996.70x = 335,099,937.69
  5. Step 5: Solve for x
    x = 335,099,937.69/20,996.70
  6. Step 6: Final answer
    x = 15,959.65

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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.