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Finding the Fourth Proportional to 18,723.30, 28,084.86 and 7,627.38

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Solution

The fourth proportional to 18,723.30, 28,084.86 and 7,627.38 is: 11,441.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,723.30 : 28,084.86 = 7,627.38 : x
  2. Step 2: Convert to fraction form
    18,723.30/28,084.86 = 7,627.38/x
  3. Step 3: Cross multiply
    18,723.30x = 28,084.86 × 7,627.38
  4. Step 4: Simplify right side
    18,723.30x = 214,213,899.47
  5. Step 5: Solve for x
    x = 214,213,899.47/18,723.30
  6. Step 6: Final answer
    x = 11,441.03

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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.