Home / 20,728.38-28,609.79-13,173.24

Finding the Fourth Proportional to 20,728.38, 28,609.79 and 13,173.24

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Solution

The fourth proportional to 20,728.38, 28,609.79 and 13,173.24 is: 18,182.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.38 : 28,609.79 = 13,173.24 : x
  2. Step 2: Convert to fraction form
    20,728.38/28,609.79 = 13,173.24/x
  3. Step 3: Cross multiply
    20,728.38x = 28,609.79 × 13,173.24
  4. Step 4: Simplify right side
    20,728.38x = 376,883,564.15
  5. Step 5: Solve for x
    x = 376,883,564.15/20,728.38
  6. Step 6: Final answer
    x = 18,182.01

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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.