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Finding the Fourth Proportional to 13,446.40, 20,173.65 and 9,558.40

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Solution

The fourth proportional to 13,446.40, 20,173.65 and 9,558.40 is: 14,340.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,446.40 : 20,173.65 = 9,558.40 : x
  2. Step 2: Convert to fraction form
    13,446.40/20,173.65 = 9,558.40/x
  3. Step 3: Cross multiply
    13,446.40x = 20,173.65 × 9,558.40
  4. Step 4: Simplify right side
    13,446.40x = 192,827,816.16
  5. Step 5: Solve for x
    x = 192,827,816.16/13,446.40
  6. Step 6: Final answer
    x = 14,340.48

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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.