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Finding the Fourth Proportional to 18,461.10, 27,695.70 and 9,105.60

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Solution

The fourth proportional to 18,461.10, 27,695.70 and 9,105.60 is: 13,660.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,461.10 : 27,695.70 = 9,105.60 : x
  2. Step 2: Convert to fraction form
    18,461.10/27,695.70 = 9,105.60/x
  3. Step 3: Cross multiply
    18,461.10x = 27,695.70 × 9,105.60
  4. Step 4: Simplify right side
    18,461.10x = 252,185,965.92
  5. Step 5: Solve for x
    x = 252,185,965.92/18,461.10
  6. Step 6: Final answer
    x = 13,660.40

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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.