Home / 20,351.66-28,082.43-11,399.54

Finding the Fourth Proportional to 20,351.66, 28,082.43 and 11,399.54

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Solution

The fourth proportional to 20,351.66, 28,082.43 and 11,399.54 is: 15,729.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,351.66 : 28,082.43 = 11,399.54 : x
  2. Step 2: Convert to fraction form
    20,351.66/28,082.43 = 11,399.54/x
  3. Step 3: Cross multiply
    20,351.66x = 28,082.43 × 11,399.54
  4. Step 4: Simplify right side
    20,351.66x = 320,126,643.67
  5. Step 5: Solve for x
    x = 320,126,643.67/20,351.66
  6. Step 6: Final answer
    x = 15,729.76

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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.