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Finding the Fourth Proportional to 18,105.28, 27,157.70 and 4,957.64

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Solution

The fourth proportional to 18,105.28, 27,157.70 and 4,957.64 is: 7,436.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,105.28 : 27,157.70 = 4,957.64 : x
  2. Step 2: Convert to fraction form
    18,105.28/27,157.70 = 4,957.64/x
  3. Step 3: Cross multiply
    18,105.28x = 27,157.70 × 4,957.64
  4. Step 4: Simplify right side
    18,105.28x = 134,638,099.83
  5. Step 5: Solve for x
    x = 134,638,099.83/18,105.28
  6. Step 6: Final answer
    x = 7,436.40

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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.