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Finding the Fourth Proportional to 10,991.84, 16,504.12 and 10,609.11

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Solution

The fourth proportional to 10,991.84, 16,504.12 and 10,609.11 is: 15,929.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,991.84 : 16,504.12 = 10,609.11 : x
  2. Step 2: Convert to fraction form
    10,991.84/16,504.12 = 10,609.11/x
  3. Step 3: Cross multiply
    10,991.84x = 16,504.12 × 10,609.11
  4. Step 4: Simplify right side
    10,991.84x = 175,094,037.79
  5. Step 5: Solve for x
    x = 175,094,037.79/10,991.84
  6. Step 6: Final answer
    x = 15,929.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.