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Finding the Fourth Proportional to 15,108.82, 20,849.34 and 8,393.98

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Solution

The fourth proportional to 15,108.82, 20,849.34 and 8,393.98 is: 11,583.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,108.82 : 20,849.34 = 8,393.98 : x
  2. Step 2: Convert to fraction form
    15,108.82/20,849.34 = 8,393.98/x
  3. Step 3: Cross multiply
    15,108.82x = 20,849.34 × 8,393.98
  4. Step 4: Simplify right side
    15,108.82x = 175,008,942.97
  5. Step 5: Solve for x
    x = 175,008,942.97/15,108.82
  6. Step 6: Final answer
    x = 11,583.23

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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.