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Finding the Fourth Proportional to 15,093.98, 20,831 and 8,380.90

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Solution

The fourth proportional to 15,093.98, 20,831 and 8,380.90 is: 11,566.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,093.98 : 20,831 = 8,380.90 : x
  2. Step 2: Convert to fraction form
    15,093.98/20,831 = 8,380.90/x
  3. Step 3: Cross multiply
    15,093.98x = 20,831 × 8,380.90
  4. Step 4: Simplify right side
    15,093.98x = 174,582,527.90
  5. Step 5: Solve for x
    x = 174,582,527.90/15,093.98
  6. Step 6: Final answer
    x = 11,566.37

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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.