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Finding the Fourth Proportional to 15,196.88, 20,972.04 and 8,909.84

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Solution

The fourth proportional to 15,196.88, 20,972.04 and 8,909.84 is: 12,295.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,196.88 : 20,972.04 = 8,909.84 : x
  2. Step 2: Convert to fraction form
    15,196.88/20,972.04 = 8,909.84/x
  3. Step 3: Cross multiply
    15,196.88x = 20,972.04 × 8,909.84
  4. Step 4: Simplify right side
    15,196.88x = 186,857,520.87
  5. Step 5: Solve for x
    x = 186,857,520.87/15,196.88
  6. Step 6: Final answer
    x = 12,295.78

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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.