Home / 20,828.72-28,743.24-11,397.44

Finding the Fourth Proportional to 20,828.72, 28,743.24 and 11,397.44

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Solution

The fourth proportional to 20,828.72, 28,743.24 and 11,397.44 is: 15,728.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.72 : 28,743.24 = 11,397.44 : x
  2. Step 2: Convert to fraction form
    20,828.72/28,743.24 = 11,397.44/x
  3. Step 3: Cross multiply
    20,828.72x = 28,743.24 × 11,397.44
  4. Step 4: Simplify right side
    20,828.72x = 327,599,353.31
  5. Step 5: Solve for x
    x = 327,599,353.31/20,828.72
  6. Step 6: Final answer
    x = 15,728.25

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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.