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Finding the Fourth Proportional to 16,638.88, 22,961.76 and 9,186.88

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Solution

The fourth proportional to 16,638.88, 22,961.76 and 9,186.88 is: 12,677.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,638.88 : 22,961.76 = 9,186.88 : x
  2. Step 2: Convert to fraction form
    16,638.88/22,961.76 = 9,186.88/x
  3. Step 3: Cross multiply
    16,638.88x = 22,961.76 × 9,186.88
  4. Step 4: Simplify right side
    16,638.88x = 210,946,933.71
  5. Step 5: Solve for x
    x = 210,946,933.71/16,638.88
  6. Step 6: Final answer
    x = 12,677.95

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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.