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Finding the Fourth Proportional to 15,109.44, 20,843.76 and 9,805.92

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Solution

The fourth proportional to 15,109.44, 20,843.76 and 9,805.92 is: 13,527.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,109.44 : 20,843.76 = 9,805.92 : x
  2. Step 2: Convert to fraction form
    15,109.44/20,843.76 = 9,805.92/x
  3. Step 3: Cross multiply
    15,109.44x = 20,843.76 × 9,805.92
  4. Step 4: Simplify right side
    15,109.44x = 204,392,243.06
  5. Step 5: Solve for x
    x = 204,392,243.06/15,109.44
  6. Step 6: Final answer
    x = 13,527.45

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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.