Home / 20,828.82-28,744.26-11,397.42

Finding the Fourth Proportional to 20,828.82, 28,744.26 and 11,397.42

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Solution

The fourth proportional to 20,828.82, 28,744.26 and 11,397.42 is: 15,728.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.82 : 28,744.26 = 11,397.42 : x
  2. Step 2: Convert to fraction form
    20,828.82/28,744.26 = 11,397.42/x
  3. Step 3: Cross multiply
    20,828.82x = 28,744.26 × 11,397.42
  4. Step 4: Simplify right side
    20,828.82x = 327,610,403.81
  5. Step 5: Solve for x
    x = 327,610,403.81/20,828.82
  6. Step 6: Final answer
    x = 15,728.71

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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.