Home / 20,828.75-28,744.38-11,397.31

Finding the Fourth Proportional to 20,828.75, 28,744.38 and 11,397.31

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Solution

The fourth proportional to 20,828.75, 28,744.38 and 11,397.31 is: 15,728.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.75 : 28,744.38 = 11,397.31 : x
  2. Step 2: Convert to fraction form
    20,828.75/28,744.38 = 11,397.31/x
  3. Step 3: Cross multiply
    20,828.75x = 28,744.38 × 11,397.31
  4. Step 4: Simplify right side
    20,828.75x = 327,608,537.76
  5. Step 5: Solve for x
    x = 327,608,537.76/20,828.75
  6. Step 6: Final answer
    x = 15,728.67

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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.