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Finding the Fourth Proportional to 43,698.20, 65,569.17 and 20,005.70

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Solution

The fourth proportional to 43,698.20, 65,569.17 and 20,005.70 is: 30,018.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,698.20 : 65,569.17 = 20,005.70 : x
  2. Step 2: Convert to fraction form
    43,698.20/65,569.17 = 20,005.70/x
  3. Step 3: Cross multiply
    43,698.20x = 65,569.17 × 20,005.70
  4. Step 4: Simplify right side
    43,698.20x = 1,311,756,816.42
  5. Step 5: Solve for x
    x = 1,311,756,816.42/43,698.20
  6. Step 6: Final answer
    x = 30,018.56

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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.