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Finding the Fourth Proportional to 15,192.44, 20,965.78 and 8,387.22

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Solution

The fourth proportional to 15,192.44, 20,965.78 and 8,387.22 is: 11,574.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,192.44 : 20,965.78 = 8,387.22 : x
  2. Step 2: Convert to fraction form
    15,192.44/20,965.78 = 8,387.22/x
  3. Step 3: Cross multiply
    15,192.44x = 20,965.78 × 8,387.22
  4. Step 4: Simplify right side
    15,192.44x = 175,844,609.33
  5. Step 5: Solve for x
    x = 175,844,609.33/15,192.44
  6. Step 6: Final answer
    x = 11,574.48

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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.