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Finding the Fourth Proportional to 13,321.64, 18,383.54 and 7,353.32

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Solution

The fourth proportional to 13,321.64, 18,383.54 and 7,353.32 is: 10,147.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,321.64 : 18,383.54 = 7,353.32 : x
  2. Step 2: Convert to fraction form
    13,321.64/18,383.54 = 7,353.32/x
  3. Step 3: Cross multiply
    13,321.64x = 18,383.54 × 7,353.32
  4. Step 4: Simplify right side
    13,321.64x = 135,180,052.35
  5. Step 5: Solve for x
    x = 135,180,052.35/13,321.64
  6. Step 6: Final answer
    x = 10,147.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.