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Finding the Fourth Proportional to 18,604.60, 27,863.70 and 12,729.40

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Solution

The fourth proportional to 18,604.60, 27,863.70 and 12,729.40 is: 19,064.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,604.60 : 27,863.70 = 12,729.40 : x
  2. Step 2: Convert to fraction form
    18,604.60/27,863.70 = 12,729.40/x
  3. Step 3: Cross multiply
    18,604.60x = 27,863.70 × 12,729.40
  4. Step 4: Simplify right side
    18,604.60x = 354,688,182.78
  5. Step 5: Solve for x
    x = 354,688,182.78/18,604.60
  6. Step 6: Final answer
    x = 19,064.54

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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.