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Finding the Fourth Proportional to 18,110.40, 27,165.60 and 12,861.60

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Solution

The fourth proportional to 18,110.40, 27,165.60 and 12,861.60 is: 19,292.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,110.40 : 27,165.60 = 12,861.60 : x
  2. Step 2: Convert to fraction form
    18,110.40/27,165.60 = 12,861.60/x
  3. Step 3: Cross multiply
    18,110.40x = 27,165.60 × 12,861.60
  4. Step 4: Simplify right side
    18,110.40x = 349,393,080.96
  5. Step 5: Solve for x
    x = 349,393,080.96/18,110.40
  6. Step 6: Final answer
    x = 19,292.40

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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.