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Finding the Fourth Proportional to 15,704.94, 21,674.34 and 8,991.12

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Solution

The fourth proportional to 15,704.94, 21,674.34 and 8,991.12 is: 12,408.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,704.94 : 21,674.34 = 8,991.12 : x
  2. Step 2: Convert to fraction form
    15,704.94/21,674.34 = 8,991.12/x
  3. Step 3: Cross multiply
    15,704.94x = 21,674.34 × 8,991.12
  4. Step 4: Simplify right side
    15,704.94x = 194,876,591.86
  5. Step 5: Solve for x
    x = 194,876,591.86/15,704.94
  6. Step 6: Final answer
    x = 12,408.62

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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.