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Finding the Fourth Proportional to 18,653.88, 27,980.82 and 6,170.55

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Solution

The fourth proportional to 18,653.88, 27,980.82 and 6,170.55 is: 9,255.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,653.88 : 27,980.82 = 6,170.55 : x
  2. Step 2: Convert to fraction form
    18,653.88/27,980.82 = 6,170.55/x
  3. Step 3: Cross multiply
    18,653.88x = 27,980.82 × 6,170.55
  4. Step 4: Simplify right side
    18,653.88x = 172,657,048.85
  5. Step 5: Solve for x
    x = 172,657,048.85/18,653.88
  6. Step 6: Final answer
    x = 9,255.83

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Similar ratio
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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.