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Finding the Fourth Proportional to 18,659.20, 27,940.20 and 17,784.40

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Solution

The fourth proportional to 18,659.20, 27,940.20 and 17,784.40 is: 26,630.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,659.20 : 27,940.20 = 17,784.40 : x
  2. Step 2: Convert to fraction form
    18,659.20/27,940.20 = 17,784.40/x
  3. Step 3: Cross multiply
    18,659.20x = 27,940.20 × 17,784.40
  4. Step 4: Simplify right side
    18,659.20x = 496,899,692.88
  5. Step 5: Solve for x
    x = 496,899,692.88/18,659.20
  6. Step 6: Final answer
    x = 26,630.28

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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.