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Finding the Fourth Proportional to 18,561.60, 27,793.80 and 13,604.40

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Solution

The fourth proportional to 18,561.60, 27,793.80 and 13,604.40 is: 20,370.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,561.60 : 27,793.80 = 13,604.40 : x
  2. Step 2: Convert to fraction form
    18,561.60/27,793.80 = 13,604.40/x
  3. Step 3: Cross multiply
    18,561.60x = 27,793.80 × 13,604.40
  4. Step 4: Simplify right side
    18,561.60x = 378,117,972.72
  5. Step 5: Solve for x
    x = 378,117,972.72/18,561.60
  6. Step 6: Final answer
    x = 20,370.98

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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.