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Finding the Fourth Proportional to 57,969.64, 86,993.34 and 20,529.64

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Solution

The fourth proportional to 57,969.64, 86,993.34 and 20,529.64 is: 30,808.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,969.64 : 86,993.34 = 20,529.64 : x
  2. Step 2: Convert to fraction form
    57,969.64/86,993.34 = 20,529.64/x
  3. Step 3: Cross multiply
    57,969.64x = 86,993.34 × 20,529.64
  4. Step 4: Simplify right side
    57,969.64x = 1,785,941,952.60
  5. Step 5: Solve for x
    x = 1,785,941,952.60/57,969.64
  6. Step 6: Final answer
    x = 30,808.23

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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.