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Finding the Fourth Proportional to 13,520.28, 20,231.08 and 7,976.28

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Solution

The fourth proportional to 13,520.28, 20,231.08 and 7,976.28 is: 11,935.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.28 : 20,231.08 = 7,976.28 : x
  2. Step 2: Convert to fraction form
    13,520.28/20,231.08 = 7,976.28/x
  3. Step 3: Cross multiply
    13,520.28x = 20,231.08 × 7,976.28
  4. Step 4: Simplify right side
    13,520.28x = 161,368,758.78
  5. Step 5: Solve for x
    x = 161,368,758.78/13,520.28
  6. Step 6: Final answer
    x = 11,935.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.