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Finding the Fourth Proportional to 20,648.91, 30,981.87 and 10,795.26

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Solution

The fourth proportional to 20,648.91, 30,981.87 and 10,795.26 is: 16,197.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,648.91 : 30,981.87 = 10,795.26 : x
  2. Step 2: Convert to fraction form
    20,648.91/30,981.87 = 10,795.26/x
  3. Step 3: Cross multiply
    20,648.91x = 30,981.87 × 10,795.26
  4. Step 4: Simplify right side
    20,648.91x = 334,457,341.94
  5. Step 5: Solve for x
    x = 334,457,341.94/20,648.91
  6. Step 6: Final answer
    x = 16,197.34

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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.